Life works like this. There's good, and then there's bad. Together, they equal what we call "life experience". Yes, I am paraphrasing a cheezy '80s sitcom theme; bonus points if you know which.

We become well-balanced humans by dealing with the good and the bad. The bad teaches us how to handle difficulties in life. The bad is actually an important part of maturing, learning, growing and being human.

What isn't all that good is to 'filter out' anything you don't agree with, anyone who doesn't see 100% eye-to-eye with you, anyone who might express a bit of frustration or anger or other normal human emotions. This is called putting yourself in an 'echo chamber' and results in people having a skewed and distorted view of how things should be.

Living in an echo-chamber, where only your pre-determined values and behaviors are reflected back to you, actually reduces your capacity to deal with humankind at large. It's not healthy, especially not for developing humans. For older folk, it might be too late, but for a twenty-year-old, it can be hugely detrimental.

People that have one or two folks on an ignore list have come into contact with the occasional off-the-charts reprehensible behavior. That is understandable. If someone on the street attacks you, you'd not want to deal with that person again.

People that have a hundred, two hundred or four hundred (or more) people on a blacklist are filtering out benign behaviors, like a simple complaint, or an attitude they don't like, or (to be honest) negative behaviors that come as a result of their own, personal behaviors. This isn't healthy at all. It snowballs, as you now start to believe that you don't have to even try to understand someone looking at you sideways. Block and move on.

It's not normal, proper or healthy to live like that, nor is it needed at all. I've done ten thousand hours in older MMOs (EQ, Asheron's Call), twenty-five thousand hours in WoW, and three-hundred hours in FFXIV, and have never felt the need to put someone on a block list. Have I had arguments with folks? Yeah, though you could count them on your fingers without going to your toes. I dealt with these arguments, won some, lost some, and moved on.