@lioh I unfollow crossposters too, mostly because as I said they tend to be spammy, posting but not being an active contributor to the thread here.
But my motivations for unfollowing them is very different. I dont think simply referencing a closed system is a good reason to shun someone and like i said in the case that such a cross poster is active here and on the threads they post then I wont take issue with it. Its just that most cross posters arent, thats the only issue I see.
People will use the system they want to do. I really dont care about if they "point" some users to twitter, if we are going to loose those users to twitter that would happen regardless in most cases.