I found some simple traps which look promising to me here:
https://www.bobvila.com/articles/diy-mosquito-trap/
The first one is co2 based, using yeast.
I kinda like the idea of the last one, especially for indoors in the summer. It seems very simple and makes a lot of sense to me: secure some window screen mesh to the output side of a box fan. Let the fan run. The mosquitos get sucked in and trapped against the mesh until they dry out and die. Spray them with a mixture of rubbing alcohol and water if you want to speed up their demise.
The bot they are talking about isn’t trying to hide that it is a Reddit reposting bot. The posts from that bot start with some boilerplate like “this content is copied from /r/blah”.
So if you aren’t seeing this content, there is nothing you need to do. If you do see this content, block the user that posted it.
Edit: the Reddit bot that I blocked is bot@lemmit.online