Why would you even do that? You'll lose any progress you've made pointwise. This site will still lean conservative, and if you espouse opinions that people disagree with, they will still point it out. Sometimes, depending on the subject and tone of the disagreement, some members (including myself at times) will venture into rudeness. But if your opinions can't withstand you being called an idiot without you whimpering away and licking your wounds, maybe you should reevaluate your opinions. I assure you, I've been called just about everything under the sun. I get that it's frustrating when someone you disagree with won't even try to look at things from your perspective (do you even attempt to look at things from thier's?)
Most arguments on this site start as genuine attempts at discourse, but yes, they sometimes do devolve. When you realize that has happened, try to learn to let it go. I'm still working on that myself/