This is something that irritates the %@#& out of me, but I guess I'm getting used to it.
Keyboard warriors out to spread hate and get a reaction. For them, this is the fun they seek.
You watch how brave people are behind the wheel of their car. Moment they step out, not very brave. Same thing behind a computer screen.
Difficulty is in that the recipient feels the power of the words. Words can kill when heard by someone who is going to take them to heart.
Unfortunately it's the Wild West out there, and there's very few sheriffs who can keep the peace.
Only you can control how you react to the words. Be strong and wield the ban hammer if you have that option