I don't think anyone on here even thinks that the letters will stop anything (apart from the oik on his parents internet connection), but if there's no reaction to the letters then surely the BPI will look at other tougher methods....
It's like the speed limit on motorways, early on there wasn't one but because some idiots were doing rediculous speeds compared with the flow of traffic we all have to now plod along at 70...
I'd personally be happy if VM blocked the P2P ports, but that would push everyone into other methods...
Worrying thing is where does all this end as to make the BPI happy internet access in the UK would have drastic changes