Goes beyond ignore, he's a deranged felon.
Many others like him have been nuked here, might as well put him in with them.
And many others like him post every day, but the crowd likes them, so it slides
Ignore is one of the best features here to weed out the dickheads.
If you never respond to them, the smart ones will eventually figure out you're not listening
The dumb ones will keep talking to you anyway