I hate it when that happens, after I've been so loyal!! And you have to respect a person's game if they are good enough to trick people, but keep it classy and offer an explanation/apology before or after sending an ally out the door. That is all! :)
Big Brother always poses a problem for me because I always love someone from each alliance that is pitted against the other. For example, Janelle and James. Loved both of them but hated that if one succeeded it meant the other one was failing. It just causes confusion and mixed feelings. Samr goes for Dan and Frank. Love them both! But I want Frank to win. Dan has already won and Frank is loyal. Gotta love loyalty.