Well, that's how combat parsers work anyway. And they have the little Recount like box just the same as WoW's recount which can be insta posted in chat. Just the same as WoW's Recount.
But even beside parsers*
Rift,
Warhammer,
AOC,
ROM,
TSW all have addon support of a similar manner. Even via Curse.
By no means would I say jerkface behavior is exclusive to World of Warcraft. But the number of people that play WoW is pretty significantly more than a lot of other MMOs. With a very high probability of running into
dps chat spam dude due to the sheer volume and broadness of what is the most mass market MMO short of Toontown & Hello Kitty Adventure.
*I tend to call all combat logging tools parsers. Though admittedly that is incorrect on my part. Old habits and all that.