If there's a poster who annoys you enough that you want to fire off insults and abuse it's a safer idea to add them to your ignore list than to react. You don't have to read their comments then, although you'll still see them if someone else quotes them.
Profile
Modify Profile
Buddies/Ignore list
Edit Ignore list
Type in the username
Click Add
Their posts won't show then unless you choose to open them.
Profile
Modify Profile
Buddies/Ignore list
Edit Ignore list
Type in the username
Click Add
Their posts won't show then unless you choose to open them.