> By that argument, everyone visiting open source conference "sprints" should be deported? By which argument? What job are they doing? Who's paying them? If th

> By that argument, everyone visiting open source conference "sprints" should be deported? By which argument? What job are they doing? Who's paying them? If they're making money off it, then yes, they probably should be deported. If they're doing work someone else could be making money off of, they should also probably be deported. > For that matter, if I travel, and happen to do work while in another country that would also be in violation of immigration laws? You would have to consult the laws of the other country in question. I'm sure the only way you could even possibly hope to make this argument in the US is if the company has no US suppliers, customers, or other US-related interests whatsoever. But even that is extremely doubtful. The general rule for immigration is this: If it's not authorized, it's unauthorized. Unless you have clearly and unambiguously established that it's authorized, don't do it. > I guess at least visiting heads of state get a diplomatic waver... Hardly. In the US, they'll need an A visa, just like every other visiting official. http://travel.state.gov/visa/temp/types/types_2637.html http://travel.state.gov/visa/temp/types/types_2637.html