It's perfectly possible to, rather then the interface you gave (which is somwhat clunky), look for strings of the form ...++, and ++ the user given in the brackets. (You'd have to use some subtlety so that $foo[3]++ wouldn't ++ the user named 3, even if you accidently left off the code tags, and, for that matter, so that ++foo works. Not too much of a problem, might just exclude the few monks with all-numeric names.)

Weather this is worthwhile is another question. I think a 1/5 chance of gaining an XP per mention is worthwhile.

I'll wait to see what the gods think before starting a patch, though.