If it going to pop once every time you join a server , that will be good.
And how in the world it will lag you since there are Stupid spammers every where , and you never Lag-out from them , so Eventually Those messages will lag no one.
Also If There is a timer where you can say like "Remind me later" or Remind me after 15Min - 30Min - 1hour
~Supporting this great idea.