I'm likely on that list as well. For me, I'm indifferent. People get contentious with me and often can't handle it when I respond in kind, so they block me. I've seen it happen time and time again. I personally won't block someone, as I think everyone has something meaningful to contribute at least some of the time and I don't want to miss it, but I don't count it as any great loss when someone contentious blocks me. It just leaves me a greater percentage of people willing to engage in more civil conversation.
I will say that I think this implementation of the block feature is the worst one that I've seen this site enact. One person blocked me and then proceeded to talk about me behind my back. If I hadn't seen someone who didn't have me blocked defend me by name, I'd never have known. Also, being unable to see when someone quotes a person who has blocked me has caused me numerous issues. I have repeatedly responded to a post that appears to be someone just posting without a quote, only to be told that my response is out of context(which it was due to being unable to see who was quoted) or else asked why I am entering into a conversation between two people. As a result, I've had to start logging out periodically in threads in which I'm active, so as to see the proper contexts and see if I am being talked about. I'm not going to respond to anyone who has me blocked, but being able to see their posts is necessary for a proper response to those who I can see.