Is the silent treatment really the way to go?

Is the silent treatment really the way to go?
I'm hurt and pissed off right now. There are people that I though were friends, but for some reason now ignore my texts and emails. I have asked if there was something that I did to upset them. I have apologized for any unintentional hurt or action. Yet I get no response. Why is that? I have some wonderful friends yet the bad apples seem to really get under my skin. Since these few people can't seem to communicate if there is an issue maybe I should take the stance that they just aren't worth of MY friendship. It's their loss. If only I could convince myself that I am wasting energy thinking about them. I have a very sincere friendship to offer, but I guess that is not why they want. Well ya know, if or when they try to respond to me it's a little too late. Time to weed out the good from the bad!