Next month Ireland's largest ISP will begin an anti-piracy campaign against its own customers. After caving in entirely to the orders of the music industry, Eircom will first warn alleged copyright infringers, then slow their connection "to a snail's pace", all followed up by disconnection from the Internet.
Ireland’s Largest ISP Starts Throttling and Disconnections | TorrentFreak

Being shaped myself, I know how much it sucks. There are measures against it, but probably only a VPN will protect you against your ISP detecting BitTorrent traffic and disconnecting you for it.