I had loads of complaints over the years, not one stuck.
Most were simply people that doesn't understand the the game is played, like the, "you need a warrant to do that" in the story here. No we don't.
A few were malicious.
One malicious complaint was very serious and I could have gone to prison. Unfortunately for the complainant, although the rota showed me as due on duty I was actually off work sick with a bad dose of vertigo on the day of the allegation. Not only that, but at the exact time of the claimed behaviour I was in consultation with my GP.
So, I knew I was well in the clear, but kept it quiet I was suspended from work and thoroughly enjoyed almost 3 months off work on full pay before Professional Standards called me in for an interview. Only then did I point out I was not on duty that day.
"Why didn't you tell us?" they cried.
"Why didn't you ask?" was my very obvious reply.
I in turn made a complaint about the poor investigative skills of the PSD OIC and I received a letter of apology from their Supernintendo. I could have taken it further, but left it at that - I knew from day one I was in the clear and wasn't stressed or anything, and I'd actually enjoyed playing them for the idiots they were (as did my Fed funded solicitor.)