If you mass edit, it’ll get restored from older versions - pointless really.

Find your top 20-30 posts and comments and manually edit them. Make them sound real, but at the same time contain complete bullshit. Anyone, or any thing reading them will be misinformed- not by you but by reddit thus making reddit less valuable.

To really be a thorn in reddits side we need to be actively, but subtly malicious.

At the risk of sounding like a shill, I like Kagi.

This why it pays to use a search engine that lets you blocklist sites