Exactly. My ISP isn't exactly small, but it's also not one of the major players, and they don't block anything either.
In fact, my other half is a rabid TV downloader and wants to watch the shows when they come out on American TV so she can discuss stuff in forums without spoilers. We have a Sky subscription so we will have paid for them when they air, she just doesn't want the lag. Anyway, the ISP have been sent the usual e-mails from lawyers about her torrenting activities. The ISP just forwards them on for information purposes and says we can ignore them if we want. Unless they get a court order, they're not doing jack shit.