I think it would be a good idea to just eliminate the ability to auto inv and auto accept invites.
This change alone would destroy the bots ability to afk make gold and give people who actual do professions for money a chance to make some gold. As far as the summoning bots go, you can just see in the LFG Bulletin Board addon 30 warlocks at every dungeon/major city spamming some auto invite meme with a preset response thanking you for using their service. While it sure is convenient, its a plague on what the game is supposed to be.
Please simply remove auto invites from the game.