That sucks.
Some people are such assholes. Unfortunately because the Internet makes people feel insulated and anonymous it brings out the worst in borderline personality types.
I have had to endure these sort of petty attacks as well and sadly most people who ARE even moderately successful attract the attentions of at least one sick bastard.
Good Luck Webzcas. If we can do anything to help let us know. If you find out who it is let us know and collectively we can help “adjust” this persons attitude.