I have heard and made countless calls for characters to be unable to post in a global chat until they have put in the time to play the game.
Spam bots are character level 1, and because Blizzard isn’t doing enough to prevent this, they are in fact, culpable.
If I was smart I would not have purchased the Expansion until this was solved. Shame on me.
I will tell everyone I know to wait until Blizzard fixes trade chat and provides a legitimate loot filter where I only see gear drops that meet my specifications.