It really depends. If It's someone like my dance instructor, judges, or teammates then yes. I care a whole bunch.
If it's just someone being hateful for no reason, then no. I've learned that some people are just like that, can't help them, not really my problem. I try my best to block all negativity out completely, it's all pointless and a waste of time. This includes family and friends too. They aren't always so innocent either.