That's unacceptable and dickish. The last thing we need is for the rest of America to turn their backs on us.
The art museum in Jackson had to cancel some big event there because the artist is a government employee in New York and has been forbidden to travel here. I can assure you the art museum and its patrons aren't discriminating against gays.
On the other hand, the people who support this law are proud that Yankee liberals aren't coming down here. These gotcha travel bans are having the opposite intended effect.