if u exile them , they go to foreign countries misrepresenting Islam and Pakistan. If you let them free in your own country, they protest and just make you look bad and evil. So you just execute them and finish the whole story.
Execute:

Relax, ur not on my hit list unless ur a g@y activist, which i don't think u r...
Hoorein, yeah thats another very interesting topic...
but remember its only a part of the whole deal.