its simple, you pay for a connection - they give you the data. Simple. No one of this, but you are using it too much b******t. Sorry didn't you say unlimited? Oh you really meant unlimited if I don't do anything? Oh so you just want me to browse 5 pages a month and then charge me £30. Oh right, that sounds like a deal.
I personally have no problem with you pay what you get. If you get a connection that is throttled at 100GB then that's fine, you sign up to the deal, but then the ISP should have no blocking of what you do. They have no right. If you want to watch 100GB of BBC programmes in the first day then that's up to you... they offer you a speed, which is fine to watch streaming media then sweet. They have no right to control what you get. I think they should shut up and not worry... its not like they aren't making money.