On food I was actually talking about the non-related spam, such as the x8 newest. Mostly gummies and pills, though maybe you're already blocking those like you said (and this might apply to the below text too).
Though looking at it there are also some semi-related local-specific self advertisements by likely bots (Best X in location Y / near me). So I wasn't talking about food blogs, but I do see some of those that are downvoted (and they are clickbait-y). One of the blogspot ones (the one who marked it as 18+) has one thread about Quora SEO and another thread called "hot girl" (random woman outside)
Aside from blocking I could see soft hiding (especially with ratings and/or grouping), though I'm not so sure how well that would work with assessing a thread or a user. Though I notice a lot of accounts like this don't seem to comment much if at all.