I think some are decent Freepers who have swallowed the purple koolaid. And some are distributors of purple koolaid.
I think we're all pretty adept at identifying trolls after a few attempts at engaging with them. We know who they are. We've been infiltrated and our normalcy bias want to tell us it's just the interwebz as usual. I'm afraid it's not.
This is not a game.
Speaking personally, it is difficult to ignore them.
However, Ignore them is our most effective weapon!
Please, don't let the trolls hurt the puppy