With all the RMT spam in /shout and /yell

I was thinking on how to solve the spam issue, its simple. Put a cool down on the use of /shout and /yell of 1-3 mins, this will allow players to block the idiot RMT spammers and not get like 40 spam msg's before the spammer is blocked.

as well as having a cooldown on the use of /shout and /yell, restricting the use of /shout and /yell to level 10. it may not stop the RMT spam but it would slow down the frequency of the spamming.

i also noticed that RMT spammers that i have reported and blocked 3 days ago have not yet been stopped as i noticed a couple of them still in game yesterday spamming the shouts.

the problem at the moment is that my blacklist is sitting at 193/200 and only 3 of those charaters have been deleted and the other 190 are still active as far as i know. when my blocklist is full i either:-
1. turn of shout, yell and tell or get fed up
2. stop playing till there is a sollution
3. never enter a city till there is a sollution