Secret surveillance equipment in hotel rooms

I have often wondered how prevalent voyeurs in the hotel/guest house industry are, and to what lengths they would go to secretly videotape their guests. News reports of this kinda thing pop up every now and then, and it usually results from surveillance equipment getting discovered by an overly attentive or paranoid guest.

But sometimes these voyeurs are quite bold in sharing their recorded material with others, even posting it online. I read an article some time ago about a married guy having stumbled across a high-resolution video of himself and a hired bimbo having raunchy sex in a hotel room while he was away from home on business. Talk about a compromised position!

Are any members as suspicious (paranoid!) as I am when it comes to rented accommodation away from home? I don't own any sophisticated electronic detection devices, but I sure as hell make a very detailed visual sweep of the room - most surveillance equipment (video recording equipment, at least) can be readily found this way, if you look carefully enough. Haven't found anything to date, though. Has anybody who is also suspicious in this regard ever found their room to be bugged?