I learned about the Mew glitch when I was absolutely addicted to Gold/Silver. I was at a summer camp thing and the only other kid who liked Pokemon mentioned it, that he had it written down. Unfortunately he didn't realise that I actually HAD Yellow until the last day so I couldn't get the glitch info from him.
Since that was years ago, now that I can use YouTube to find out how to do it it's no problem. I stupidly erased my file so that I could get a Mew, and typically I got bored around Mount Moon. Which is a shame. If I get around to playing Yellow again someday, I'll likely try to make the glitch work, anyway.