Originally Posted by Bartelby
Exactly, I have only once seen anyone foot faulting where advantage may have been possible, so most people complaining about foot faults are simply being obnoxious.
Most are retentive. Ironically, they likely to do infinitely more damage to their own return game watching and worrying over someone's heel crossing an imaginary center line or back foot sliding up over the line than any possible advantage gained by the server.
If a guy is routinely ff'ing, 99 out of 100 he doesn't have a serve worth concern. And I'm not convinced calling it to "get into his head" isn't worse gamesmanship than the fault itself.