"Q: How many rec.humor" joke
Q: How many rec.humor readers does it take to change a lightbulb?
A: An infinitely growing number: One to announce that the bulb burned out. Ten to agree. One to change it, one to post in saying "I got it", one to post in saying "Yes, but they have shots for it nowadays", one to post in saying "Our news software hasn't been working and I missed the original lightbulb joke. Would someone please post it again or email it to me ?", one to post in quoting everything so far and the words "Me too", two to turn it into a cascade, another ten to build the cascade into a disk-wasting monster, one to post in with "I don't get it. Isn't this the place for FUNNY jokes ?", one to post in after two months "What's this lightbulb joke you're all talking about ?", one to repost it a month later thinking it's a new joke, one to post "I didn't get it. What's the punchline ?", one to post "Has anyone got a list of these? I'm starting a list, so please send me all your lightbulb jokes", and one to cross-post the joke to alt.fan.lightbulbs 6 months later prefixed by "Are we allowed to tell jokes in here ?" and accompanied by all of our old favourites like "How many programmers...? None that's a hardware problem.", three to ask, a month later, "What FTP sites are the old lightbulbs archived at ?", and any number to revive the entire exchange at stochastic intervals of two to six months.
Not enough votes...