I have heard of people doing it and having success with it but no one that I know personally, but I know Jinxie could do it ;-)
LOL this question reminded me of one of my FAVORITE movies: Meet The Parents. I know it's an older movie but if you have not seen it, you have got to watch it! It is sooo funny!
I won't go into too much detail about the movie and spoil it for the ones who haven't seen it, but there is a scene in the movie where the cat (Jinxie) uses the toilet and actually flushes it. In doing so, a plumbing issue floods the entire backyard just in time for the backyard wedding that was supposed to take place that particular weekend.
The incident gets blamed on Greg Focker (the guy who is "meeting the parents") It just continues to get worse and keeps going downhill from there with several other hilarious mishaps in the movie.