edit: I think OP should change the title of this thread (if possible). Calling something a scam just because it steps on your toes is an overreaction, and, in this case, has portrayed OP in a much worse light that he was trying for with intersango.
Well it sounds like a scam to me, freezing my account AFTER I made a deposit during this bizarre period where I could deposit, exchange but most certainly not withdraw? A period where I couldn't even get an answer as to why I couldn't withdraw my coins? Not a proper word back from them since this started?
It sounds to me like Intersango should get their account-blocking procedure fixed. It does not sound like a scam. Calling it a scam would imply that they are *deliberately* trying to steal your money, and by extension, others' money. Your over-hyped over-reaction does no good to anyone. And it's not just you - this behaviour of prematurely shouting SCAM SCAM SCAM at the top of one's voice seems all too frequent in the bitcoin world.
Note that I'm leaving aside the question of whether blocking *you* was justified or not; I'm just talking about the technicalities of how to go about blocking an account once it has been determined that an account should be blocked.