Has This Ever Happened to You?

I've never been a huge Replacements fan but I was listening to them yesterday at work for lack of anything better on the boss' iPod.
The song "Waitress in the Sky" was on while this dude in his early forties wearing sunglasses came in.
"Violent Femmes, huh?" he looked at me and said.
"No actually, it's The Replacements."
"No, no way this is The Femmes man; The Replacements never did this song," he insisted.
I had to just let it go. We've all had run-ins with the type I'm sure- the cool guy in his fifties that starts talking about "punk" and how he has the first Sex Pistols record, you know the one when Billy Idol was in the band; the dude who tells you that he saw Stone Temple Pilots way back when Eddie Vedder sang for them...
It's no use arguing. Guys like this are so certain of their superior knowledge that we have to swallow our pride and nod our heads. The worst thing is that their beliefs in these incorrect facts are reinforced once some one gives up on the argument.
It's sad, really.