I agree it would give you popular folks a break from the keyboard and chat buffer distraction. And for you censoring types .SU will do just as nicely.
I very seldom get the cross country

unless someone just shot me down. So, along with the .SU to return salute, hows about a .SD (smack down) salute to the either the guy that shot u down or that u shot down. Maybe .SUK for the one that killed you.
I know that I am making fun, but I think these all are legitimate dot commands that would get lots of use and promote good will in dogfights. Maybe then, 200 will be spammed by more positive text than political rants.