1 Idk if this was posted yet, I'm not reading through to make sure 1 person thought of this so add my voice to it.

On the first RMT tell you get, go to /busy mode, you can receive tells. Stay away from /bl, it's completely asinine to abuse that system on bots/RMT's.

If shouting and yelling has you concerned, there's 2 things that should have been made accessible to you when adjusting your UI:
1) Chat window should have ample space to read around 10+ lines of text at a font
of 12-14.
2) Filters can be put into place so that shouts and yells are located on another
tab/window; or simply ignore it.

I personally can't understand those ppl that feel bothered by a few lines of text (not including blanket text spam) that, by default, make no jingle or significant interruption of normal functions. No gil spammer I've received has had so many lines of text that had me sweeping the backlog to catch missed text with only 10 lines of 12 font text.