in some form or fashion
This forum (General Discussion) is a good place to post suggestions. I think you'll find that a lot of the threads started here are suggestions in some form or fashion.
Your specific issue would have also gotten an answer in the Customer Support forum ( http://us.battle.net/wow/en/forum/1011699/ ), because it happened to be about a function that can be disabled in-game. The settings you're looking for (and have hopefully already found) are in "Esc" / "Interface" / "Social". That is where you can control what happens when guild members log on and off, you receive whispers, whether you see chat bubbles, and so forth.
This is also the sort of thing that might have been appropriate for the UI and Macro forum ( http://us.battle.net/wow/en/forum/1011693/ ).
Have a nice day!
