Not a chance.

No problem

A few years at boarding school, then various rugby tours and a fair bit of travelling means that sharing a room is ok.

As for snoring - well, I snore louder. Apparently. :D

Unless you count Hostels (I have stayed in a few in the past during my study abroad trip to Europe two summers ago) I wouldn't stay with a stranger in a hotel room. I like my privacy and who knows how strange/unusual the stranger could be.

I probably didn't explain right. All of us have our own quirks & at the end of the day we go to our own rooms. Nothing to do with not trusting them, but again as far a stranger never.

Earlier this year, I shared a room with a Flyertalker I'd met only briefly so he was basically a stranger, it worked out fine. I'm an easy going guy and I don't really travel with valuables so I'd probably do it. Besides, I'm a big guy and look intimidating when I'm angry...or so I'm told :D

Other than staying in hostels when I was younger, no way. I'm a woman and need to think about safety.

Okay, perhaps a bit off topic, but several years ago my step daughter asked if I would share a hotel room with her mother for our granddaughter's graduation in Hartford, CT. I told her: "I shared a husband with her, might as well share a room!" Actually a little wierder than sharing with a stranger. :D

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Of course you have to be careful. Sharing a room with anyone could be disastrous even with some one you know. Heck, even some marriages are a disastrous. ;)
Since some people feel that they have to defend their choice, I would like to add that sharing a room with a stranger is not a virtue, nor not wanting to share, lack of character.
It's strictly a personal matter of choice.
It's got to do with how we evaluate risk. We over/under eastimate risks based on how we process information available to us.

After doing some thinking I'm going to amend my answer of never to maybe if it were a Flyer Talker "I know" & what I mean by that I feel like I know so many you even though we've never meet in person. But again I wouldn't consider those folks as strangers . So real strangers the answer is still no. Guess I've really confused you now:D

Two different examples from me where it worked out.

We were in NZ a couple of years ago (and we are not of the backpacker age) and our flight out of Queenstown was fogged out so we decided to drive to Christchurch to try to meet another flight. We rented the last car, and there was another couple behind us who also wanted to drive. My husband and I looked at each other, and decided to share our rental car with two people we had never met for a 6.5 hour drive. It all worked out fine, we stopped for lunch together, helped each other with re making airline arrangement in chistchurch.

Also, in NZ I went on three day hike (again not of backpacer age) where you shared rooms each evening male and female in bunk beds, Japanese, European, folks from downunder. My husband did not go with me, and I didnt know a single person. When people at home asked, how could you sleep in a room with strangers, I replied, They werent strangers, I had hiked with them all day!

Sometimes you have to take a chance. I know it doesnt always work out, but when it does it reinforces the commonality of people and keeps you hopeful and optimistic, which all things considered, Id rather be.

Im glad it worked out.

Excluding hostels and friends, I'd generally have to say no but there are a few exceptions.

If it was someone I had gotten to know over a few hours or so and my gut feeling was that things would be ok then maybe. I've learnt to trust my gut and I think I'd be more worried about getting ripped of, shot, or whatever while I was asleep than any sort of violence or other issue while I was awake.

Also, lets be honest, isn't that exactly what most single males (and more than the occasional female) are trying to do when they're still in the bar/nightclub/whatever at 0200?

Do cruises count? If you're traveling solo, you will be forced to share your cabin with a stranger.

This must depend on the cruise line. I cruise solo when Mr. Only doesn't want to go, and I have the cabin all to myself. I book as solo and pay 160% of the per-person doubles rate.

I would not like to be "forced" to share, but sometimes when it is voluntary, I agree to it.

From time to time I go to Esalen Institute in Big Sur, California,where they assign same-gender roommates (they have very few single rooms there), which has generally worked quite well for me. Another time I attended an international peace conference in Jerusalem, and signed up for a "shared room" as it was much less expensive than a single room. My roommate was terrific and we are still friends.

I've shared a room with a stranger multiple times with no problems, but the circumstances weren't particularly risky. An adventure travel company that I've used a few times offers the option to room with a fellow traveler on the tour as an alternative to paying the single supplement. Rather than finding it an uncomfortable experience, I've enjoyed the chance to get to know my fellow travelers better. (We tended to change roommates in every city on the tour.)

Also, I roomed with a friend of the groom when I traveled to a wedding once, and it worked out quite well. The groom was my friend, too, so I trusted his judgment.

If the situation is such, like being stuck at the airport with cancelled flights, I probably would.
I'd have to let the other person know about my snoring