My funniest was in my car and the woman behind was yapping on the phone but not paying attention, as my car is an old banger I slowed right down with the gears and not the brakes... It was worth it to see her drop the phone so I gave her the phones 4 U sign.
she was still going bonkers miles up the road as I was still laughing.

when I'm on the bike I assume everyone drives like a 6 year old so it's no surprise when they don't indicate or do cut you up. I nearly kicked someone's door on a roundabout the other day as they didn't look and cut across the roundabout.

as for the police, there are less on the roads and most are going somewhere so haven't the time to do them.