Downloading FREE Cursors

I was going to download a free cursor from Cursor Mania and became weary when I read the "contract" for it's use.  When I visited this DELL forum site, it warned against Comet Cursor.  I want to know if anyone knows if any of these "FREE" download sites can be trusted and if so which ones?  I don't want to install problems to my computer by trying to add a little interest to my cursor!  I also wondered if anyone knows about how these sites may be using the free downloads to gain entry into your computer use?