Nothing ever happens, they go after the uploaders normally.

Basically using FrostWire your fine, share what you download, be a community member!!

With torrents, i personally download it, and yo share it while you download it, say you have 55% of a film, the first 54% youll be sharing back to the community, whilst increasing the % youve downloaded. If its a good film ill keep it, if not, or a TV show, ill delet it so i wont be sharing it any more.

FYI - with torrents, you can set your upload and download speeds. Always keep both at unlimited, it will edit itself to make your downloads faster, but if you limit the upload speed (as in let people download less from you to free some bandwidth) your download speed will be affected and you will move down the queue for the film/whatever your downloading.

IF u need more help just shout