if we bring financial reasons into it, consider that copyright infringers tend to be heavy users of bandwidth and then isps would be jumping up and down about it. So that isnt their motivation.
Sorry but I will stay out of this now. I dont want this debate to go too far, I have said my views, others will read them and decide if they agree with me or not.
Mod Edit (Matt D) - For continued discussion of the Digital Economy Act 2010 during the General Election period, please see the current General Election sticky thread.