One of my strangest RuneScape experiences:
I was hanging around Lumbridge, when a female character started spamming, "follow me 4 cyb3r seks!!!!!!!!!!!"
Her advertisement picked right up. Players sprinted toward her from every direction, and she soon had a train of followers. I curiously tailed them down the road, through the woods, and into a tower that was empty save for a ladder.
She went up the ladder. So did twenty other people. I loaded into a room maybe four tiles wide, and everyone was standing by the single bed, clicking it repeatedly to get the "Zzz..." emote. Meanwhile, the person who had advertised all this was making comments like, "im so tite," "it hurts," and "o my tite pusi." A few players were saying things like, "uh uh uh," although most of them opted just to click the bed.
I stood on the side, trying to comprehend what I was looking at. Then I clicked the bed a couple times. I still didn't get it. Soon I grew disinterested and left.