Cooldown timer? PLEASE NO!!!! guys... i see almost everyone here (not all) are focusing ONLY into combats!!! We are a lot of others more in Tradding/Mining... and this /setmsg is a NEEDED tool for our job.
But you also can thing it in other way... for those ABUSERS of /l1 then /l2 .... then openfire!!.... it is also good to see the timestamp of their comments. Really good for having a good evidence who is abusing of this (in the case)... I think also good for avoid those toxic players with this easy evidence hehe.
EDIT: Please add in the Rules:
3.6 Attacking without Roleplay and not giving enough time for respond