I agree you shouldn't have to hinder or limit your usage. I think with SAMOLED though it is not burn but rather memory effect, if you were to keep a pure white screen (I think white can't remember) for a long period I believe the memory effect fades. Or so I'm told and have read anyway.
I'll have to look into that. It's like an image of a circular ring. Someone on the internet has an almost identical problem to mine but there was no solution posted (dammit! One of the commenters claimed that he had a similar circular ring too). Except his circular ring is lighter while mine is darker. It's almost in the exact same position too.