Sorry, I was talking about roof mount bike racks for cars. I realize I wasn't specific enough. I hate the mounts that hold the whole bike up there; I especially hate driving behind them while they wag to and fro. Ditto for hitch-mount racks.

As for pitlocks, I have no experience. I have no bikes I consider really desirable and live nowhere where anyone else would consider them desirable. I think they sound like a good idea, though.