I generally follow players that play for Motherwell because you can get wee snippets of info you dont get elsewhere- how many of the rumours on this site are attributed to Twitter, for example?
I usually unfollow players as soon as they leave us- not through any wild hatred or anything mental like that- purely because I dont need to see them posting stuff about their new clubs. I tend to continue following players I have a particular fondness for- Moult being one and Murphy being another. However, seeing Murphy post up photos of himself in Rangers strips as a kid and the gushing over all things h*n put me off him. It also made me realise that I could expect to see that sort of guff on a regular basis as he plays for them. I dont hate the guy but the memory of him playing for us has now been sullied somewhat.