The OP certainly has some good suggestions, but the article reminds me of the Saturday Night Live skit The Anal Retentive Chef. Are people really going to remember a laundry list of travel tips or should this be far more condensed. Also, the list doesn't really put much onus on the traveler to be responsible for their actions.
Fight off muggers with with a rolled up newspaper? Are you going to scream, "bad dog" while you do that? I'm sure the knife wielding mugger will be intimidated by Monday's USA Today. Perhaps skip travel to parts of the world with unstable governments or high rates of violent crime would be better advice.
Don't recline your chair and don't bring kids on board? Please. I've never, ever had a drink spilled by a chair reclining. I realize that the person in front of me purchased a reclining chair so I don't jam the top of my laptop against the chair in front of me. I take responsibility for my own actions. How about suggesting that people bring along a $.5 pair of ear plugs before they fly. People are quick to complain about screaming babies, but have a look around the cabin the next time you fly. Few people bring anything to drone out the noise around them.
Do I really need to debrief myself when I land to figure out what I do and don't use? Do I need to cross reference this with my detailed packing list that I spent hours on before I left? Why would I ever need to bring a flashlight and wouldn't the hotel provide a stopper for the bath (that I likely won't get in anyways since who knows how long since it was properly cleaned). Do I really want to use a dirty swim suit as underwear or should I be disgusting and use dirty underwear in the pool? Why would I take a map when I can get one locally. Figuring out what to do when you get there is half the fun for some people.
Since when is 'seat poaching' an issue. Travelers are given boarding passes with an assigned seat on almost every airline. Someone sitting in your seat is easily rectified. The tip is to ask someone to change from the coveted seat? Just so I get it right, the person in the middle seat in the last row next to the toilet should walk up to the person with the exit aisle and ask them to switch from the coveted seat? Umm, huh? A better tip would be to watch for when the boarding door closes. That's when everyone is on board and open seats, at that point, are fair game.
The list has some good advice, but it should be trimmed down to 10 simple things. Oh, and by the way, some bags don't fit in the overhead bin lengthwise even though they fit the airlines guidelines for carry-on bags, darn it.