States are starting to crack down on income taxes for non-residents working there. Obviously in many cases they have no way of tracking but if you're there on business (and have expenses), Concur for one offers companies an audit service. The rules vary by state but if you spend enough time in a state and pass some threshold you can be on the hook to file income taxes. (A lot of the original impetus for these sorts of laws was to tax entertainers and pro athletes.)
In my case it was a privately funded trip, nobody at my company had any clue where I was beyond the ones I told.
Where is your citizenship?
If you had young children who attended local schools (even for one month), do you think that is fair? (Assume pay low/zero tax.)
My point though is that this kind of things happens all of the time because there isn't a clean process to handle these situations. The concept of a virtual country could actually help fix this by establishing channels to compensate communities for services used by roaming visitors.
I think the idea would be something along the lines of creating virtual citizens that live in the locality and meet all of the obligations of the locality, and the company just handles swapping the association of these citizens to real people when the time comes.
So then when you show up with your passport from Roamatopia all of the paperwork has been done to make sure you are pulling your weight.
Obviously this can be gamed as well but I like the idea.