Friend of mine has just been shut down by Bank Of America after doing a balance transfer to one of their cards!
He recently did a couple of balance transfers to non BOA cards too, when he called up BOA to do another one the CSR simply told him "seeing the amount of debt you currently have we aren't comfortable anymore to have you as customer, good bye."
He has an Exelent credit report, he's just currently a bit underwater.
(It's an A/A not an F/R... They gave him NO chance)