Why in the world would Damon's compelling of Matt at the end work?  Hasn't he been taking vervain religiously for the last 2 years?  That bothered me.

Why in the world would Damon's compelling of Matt at the end work?  Hasn't he been taking vervain religiously for the last 2 years?  That bothered me.

That's exactly what I thought at the time as well.  It seems logical since they are the source for all the vampires in the world.