suggestion about IGNORE chat command

maybe it is already done this way, my suggestion is to kick/ban/whatever for some time a character who gets ignored by A LOT of people in a short period of time

i.e.

- normal guy spamming as his own right bad things in general chat gets
(x)*(second) = no effect

- bot spamming stuff in chat gets tot^x ignores, effect
(y^meh)*(second) = effect + (short memory of message)

- new bot spamming old stuff
instaeffect

- new new bot spamming mixed words to unfit the old messages
meh dunno guys ain't my job this...

and make thread saying "remember to ignore bots!" or stuff like that,
bots will have few seconds of life right? hard to do? not doable? already done? thx for reading.