I'm glad I didn't see the thread, then. What's the First Lady supposed to do? Throw herself in front of the WH gates to keep them out?
Sheesh, but the fringe wackos we have around here are every bit as infuriating as the fringe wackos on the Left. They simply cannot get it through their heads that the White House and its annual events are separate from the political side of the presidency -- as are the ceremonial head of state duties of the White House occupants. Just because the gay and lesbian wing of the Left wants to trash this childrens' event, doesn't mean our First Lady must lower herself to their level. That would just turn it into a bigger circus than if she just welcomes them in her typical dignified way.
Since this is Easter, I think it appropriate to remind folks that Jesus taught us to turn the other cheek. That's nearly impossible to do under all circumstances, but because children are involved here, I think it's the only appropriate thing the First Lady can and should do.