I mean you are right to eschew discord but this isn't really particular to discord. Scraping messages for something like this can be done on any public chat room regardless of which boxes you may have that it ticks; it it's floss, decentralized, nationalized, communist, on the blockchain, indie, community run, simple protocols, whatever, in the end if anyone can read it then someone can scrape it. Discord was targeted because it was popular that is all.

Unless you eschew discord because it's popular and not because it sucks in which case score one for the hipsters I guess.

I'm much more worried about discord collecting this info and selling it, or building models on it, or just giving open access to the feds. This is just some person scraping 'public' chats.

Also You can't have discord delete your messages if you're in another chat with a discord bridge. You need to have a discord account associated with messages and since you aren't logged into discord there is no recourse.

Blows my mind how some 'privacy' chats have discord, telegram, etc bridges that constantly feeding them data. Looking at you GrapheneOS.

Once again we are proven correct