We have had only about 10-15 years, so far, to learn how to interact in this new online/digital medium. It tempts some people to do or say things they would never try in person. There are personalities which become pretty nasty given 'presumed' anonymity.

How to deal with them is not easy to decide....

If they have actually broken laws, someone 'may' be able to help, but just imagine how much work it would be to track down and 'prove' every offensive & petty bit of behavior.