Is a site like atdhe.net (pr5) or myp2p.eu legal? They basically post live streaming links of sporting events, such as NBA,NFL,MLB,etc. They don't host the streams on their server, but rather link people to p2p, justin.tv, etc. Since the content is "live", does that make any difference?
It makes no difference - it's content you don't own and even linking to it can get you in trouble in places like the US that recognize contributory infringement. Never assume that since someone else is doing it, it must be legal.