I think you're quite right...Don seems to go through life trolling (in both the real world and the internet world use of the term) for attention.  Sometimes I feel like Charlie Brown attempting to once again kick that football Lucy's holding.  I know what he's doing, but, dammit, I just can't resist.  

I'm imagining Don in the fourth grade classroom, acting out negatively and getting attention for doing so.  He's still doing it and, like those other fourth graders, we're still giving him the attention.  I'm going to try to "grow up" and just respond "oh that's just Don trying to get attention, ignore it......."  regards, Gary