I decided to put this in a separate post, since it's really important. I thought of it when I saw Redbeanz' most recent post.
If you're searching the internet for sports streams and clicking on links, you should absolutely have Adblock Plus installed in your browser. And if the site tells you that you need to remove Adblock Plus to view the stream, find another stream. I've still got some funky redirection going on in my browser which I think is the result of ignoring this, against my better judgment.
Also,
Acestream software is considered malware, but from everything I have been able to determine, it is relatively "well behaved" malware, and even in its installation agreement, it tells you that it's going to insert and replace advertisements in your browser; I take the risk with it because when it works, it gives the best quality streams; I've gotten up to 720p with little or no rebuffering. Of course, every stream, at every video quality, is different, but if an acestream is working for you, it's like watching HDTV.