Hey look, the trend is spreading: you're the second user I've seen doing that.
It'd be nice if the Lemmy devs added some sort of metadata field to support that so that (a) we could have a preference to insert it into every new comment automatically, and (b) it could be reduced to a badge on the comment header or something so that it would be less obtrusive to those of us who aren't trying to do anything that would require us to pay attention to it.