I'm currently at the Radisson Blu in Copenhagen. I typically don't ever stay in Radisson hotels, but figured I would stay here. I checked into my room and put the Do Not Disturb sign on the door and didn't think anything of it.

I am currently in my room and the phone is ringing over and over while I'm trying to work so I ignore it. Not long after there is a never-ending pounding on my door. I have the deadbolt and latch on so I know they can't enter, but the knocking won't stop. Finally I open the door and am greeted by 2 men in suits asking if everything is okay. I explain I didn't ask for them and have a do not disturb sign on my door. They explained that it was policy to check in with guests who have such a sign on the door to inquire why the sign in on the door. I try to tell them to leave but they start to get relatively hostile and we both ended up raising our voices before they finally left.

It also happens to be 10:30 PM which I would think is a bit late for such annoyance.

Is this typical?

In case it matters, I checked in yesterday, I'm leaving tomorrow and have been out and about throughout the day both days so it's not like I've been in this room without leaving for a week or something.