Before I left Reddit, I used a plugin through the api to replace all of my comments with random gibberish and then delete them. Part of this was because (mandatory) fuck spez. But more importantly, it was to protect the anonymity of my account. After years of posting, there is likely enough personal information shared to potentially connect my Reddit habits to my online identity. I wasn’t planning on using Reddit again in the future on that account, but I left it open in order to maintain some security control over the account. I’m not really sure what to do at this point because I still consider it a security vector that’s a bit concerning. There’s no way I can manually edit and delete all of my content with the snail’s-pace reddit UI, and I have no ability to assure that my content will remain unavailable or at least not publicly displayed.
If you’re comfortable mucking about in the dev console and have some aptitude for coding, it’s absolutely possible to reverse-engineer the browser calls thoroughly enough that it’s literally impossible for Reddit to tell serverside that you’re not accessing it through a browser. At that point, all you have to do is introduce some logic to loosely replicate human behavior (time-jittered, of course, as well as some varied activity windows), and you should be able to kick it off on a raspberry pi or some other low-power “I don’t care if it’s on for a few weeks” system and let it ride.