you are bang on, Slasher. There have been calls for other words/phrases to be banned.Are we sure we wanna censor every little thing that jumps over the horizon? That Mark My Words thing was limited a couple of months ago because a certain user (after which a group) was using it all over the place. So, we randomly censor this one now, and then the next, and so on, until nobody can keep track of what was censored and what was not. I say we only keep an eye out for the posters that use any kind of phrase repeatedly and call those forum disruptions, without strictly focusing on one phrase.
So, if you see posters using the same annoying phrases everywhere, report them or PM us and mention for us a few other links where they used the same phrase. It will be easier than censoring random phrases all the time.
Here are some I recall: ajde; vulture; swear words; replies to posts that only contain the word "this"; very nice boy; this request to ban masterclass from signing off his posts; mug.
You mods could probably find more. And as you point out, a lot of these words and phrases lose steam and peter out on their own.