I wonder how many people actually know what they're installing. Researchers have found that at least three versions of the program have trojans (NOT THAT KIND, GUTTER MINDS) that will send out spam of various sorts and will put your computer into a "zombie farm".
And what these lame-o'es are doing probably violates the TOS for their ISP.
If you've ever been a sysadmin, you know what user rhymes with. Well, that's what these folks are.