I had similar issues with spam bots. Best defense is both a honeypot channel and cross channel spam prevention within a certain time bracket, about 1.3 seconds to 8.6 seconds is the sweetspot. The lower covers terrible internet and thats why its not 0.0 seconds.

I made my own bot for it actually, had a support subreddit and everything, got banned from there for bullshit. Now you lot have to put up with me.

Ive got Plex and im sitting on about 40tb of Films and TV shows. I got in early with the perpetual licence a few years back.