Generally there is a centralized "tracker" that creates a torrent on the fly specifically for your user. I've you load the torrent and connect to the tracker via sometime like transmission or rtorrent or deluge, the tracker provides you with a list of peers (as far as I understand it). There's usually some settings you need to change on your torrent tool, like disarming different, DHT, etc - the sure usually has instructions for beginners. The communication between you and your peers is encrypted, so deep packet inspection at the ISP level is not possible. It also significantly reduces, but not eliminates, the risk a particular torrent is a honeypot.

I've been doing this for 20 years and I've never received a notice about torrenting from my ISPs. However, people I know that got stuff from open places like Pirate Bay and the like did get notices. The difference being I always used private trackers.