I mean I don't think you have to be that old to remember the cinnamon challenge. It took off in popularity in the early 2010 so about 10-15 years ago.

I'm old enough to have a now-adult son who was dumb enough to try it. Although, at the time, I didn't know what he was up to, so I just told him "it's not sweet, the only reason you think it sweet is because it's always mixed with sugar." Fortunately, he didn't take much of it.