Rule 196 is what I'm assuming you're talking about. It was a subreddit that gained popularity due to only having one rule, which is to post before leaving. The sub started after it's predecessor, r/195, was shut down by the moderators
And worth pointing out that Lemmy has a c/195 and a c/196.
I blocked both of them because I just don't want to see that many memes and /new was full of posts in those two communities. But clearly a lot of people are enjoying those.
I saw someone else respond to this on an earlier thread that it was the dorm room number of the person who created it. The sub closed down and someone created a new one as 196. The rule has always been the same.
It's annoying AF, much like the habit of people posting comments consisting of "Based" all over the place in recent times. The latter is dying down fortunately, and I hope the R meme meets a quick and painful death very soon.
The block feature is your friend. Use it liberally and don’t feel bad about it.
Seriously, if everyone blocked communities they disagree with or aren’t interested in instead of resorting to the old toxic behaviors that would be a huge improvement.
It's not really a meme. It's from c/196, where the main rule is that you have to post something before you leave, hence why everything is named rule. If you block 196@lemmy.world and 196@lemmy.blahaj.zone that should deal with almost all of the rule posts.
they are only posting the "rule posts" in 196 communities, mostly centered around lemmy.blahaj.zone, but there's a couple of other splinter subs. If you just avoid 196 you wont see it.