Argh your sig gives me a headache!

.
I've only ever had one issue with a biker and it was quite scary (to me at least as I was only 19 at the time!).
I was riding with my OH, we were about a mile from a roundabout I was unfamiliar with and this biker over took me but then slowed down!
So I was now going slower than I had been originally and the gap between me and my oh was getting bigger and the roundabout closer so I overtook.
The biker then overtook me and shook his hand at me.
It clicked then that maybe he was a copper or knew there was a copper near by so I slowed down.
My other half found me later on and we ended up going to story arms and there was the biker who had shook his fist at me!
He came right up to me and said I could have been an off duty policeman and have you done for overtaking me....
WHAT?!
I was so angry that some self righteous ass had decided to overtake me just to slow me down and then lecture me!
I wasn't even going that fast, about 60/70 which was within the legal limits and I was on a restricted bike at the time.
I thought he was a right bully as he didn't dare do it to my OH who was speeding at 90 around the bends!
Or anyone else racing around breacon that day, so why the hell pick on me and frighten me.
Prick.