as the title say, i’m thinking this might be not the best solution. but will probably help lessen the burden of the server
Maybe IMC or Dev team can implement some kind of 20-char word limit for every shout, so that the goldseller cant shout a very long sentences. hence our world chat will be much better and we all will have smoother in-game experiences due to less burden on the server
and Shout Delay system,
for example, after using 1 megaphone, one have to wait like 5 minutes for next shout, (so by the time the gold seller want to shout again, he’ll be blocked for sure :))
not the best opinion out here, but maybe we can work on this together help improvise this idea. This game still in Beta phase, thats why we can help this game to improve 
p/s: not a native speaker, forgive me for my terrible grammar mistake
Lilurica,
Fedimian Fencer