I'm chuckling whilst I read this thread - recently at the top of Fort Williams DH track, I chatted to a lad for a minute then spotted his bike. It was a low-price full suspension old Carrera (nothing against them personally, I had a decent one a few years back). This one, though, had clone V-Brakes, a spindly rear sprung shock, and clone forks. Good few years old, and one of those bikes that, at a glance, you know is crap.
I winced internally, but really didn't know how to say "mate, seriously, I'd just take that back down on the gondola so you don't hurt yourself". He was really keen, but had to ask about the start points for the tracks, so clearly a first-timer.
He had a fullface helmet, but was in jeans etc too - no body armour other than gloves that I could see. His bike sat next to my SantaCruz v10 - which looked like a massive TANK next to it.
Needless to say, about an hour later, I saw him at the bottom, head to toe in mud (soft landing somewhere!) without his bike. Scrapyard, I'd expect.
Next time, I'll probably say something, but I know I'll sound like a right w*nker for it... :?