Describe the bug
Pretty much the title, see screenshot.

To Reproduce
Not sure what's triggering this behavior.

Expected behavior
Pretty obvious, not to have chat messages posted for the world to see.

Screenshots

Desktop (please complete the following information):

• Version [e.g. v2.48]

Additional context
Add any other context about the problem here.

The misc category pretty much collects any thing that has the associated keywords for a typical looking for group message, which includes things like class names or the phrase "lfg"

See searchTags in Tags.lua for the full list here

These are the default English ones

group lfg lf lfm lftank lfheal lfhealer lfdps lfdd dd heal healer tank dps xdd xheal xhealer xtank druid hunter mage pala paladin priest rogue rouge shaman warlock warrior elite quest elitequest elitequests

Hopefully that explains why you are seeing those messages.

Also any messages you can see in game from chat channels or guild chat will be candidates to show up on the bulletin board, you can disable certain chat channels via the Filters settings category for the latest expansion of the game version you are playing on. See Image below

The addon doesnt send any messages, only collects/organizes them.