Never go for big ISP's
As a general rule I never sign up with big ISP's because they are the target of companies like Phom, wanting the personal data of their customers. And most of the times they'll sell them....for the right price, of course.
On top of that, they always have this "fair use policy" crap.
For those looking for a new ISP I'd recommend aquiss.net (and I'm sure there are many more).
Don't worry I dont work for them ar anything like that, I'm just a happy customer (had to leave two ISP's before finding the right one).
If your ISP is one of those three, change it! Don't take their crap, even if you have nothing to hide.