The Month of Apple Bugs guys wrote a (deliberately limited) piece of spyware which tracked IPs of people who ran their (pre-release) exploit sample. Then they complained because it leaked (not really a surprise here, at least).

http://applefun.blogspot.com/2007/01/canary-trap-leak-and-mole.html

People complained they were "installing root-kits", and MoAB responded that the users did it to themselves. Well, duh! That's how most viruses & spyware get distributed and installed, through ignorance combined with malicious intent on the part of the distributor. It doesn't make this any less obnoxious.