This ruling appears to apply to the content of speech. There's nothing that says you couldn't rate limit replies to prevent spam. Limiting posts to 1 per 30 s

This ruling appears to apply to the content of speech. There's nothing that says you couldn't rate limit replies to prevent spam. Limiting posts to 1 per 30 seconds, or linking the number of replies you are allowed per day to your rate of organic interactions with other people would be a way to effectively eliminate these sort of bots without censoring based on content.