How large would you say the variation is? Like minor difference depending on day and diet or massive “I could easily identify a guy based on it”?

Do I want to see it? No. Does someone want to see it? Probably, so keep em coming. I would advocate for dedicated communities though, to make it easier for people to subscribe/block them.

Jesus…

No idea, sorry. Found it on the internet

… several people start downvoting communities they don’t even participate in

Could you elaborate what you mean by that? Does “participating” mean subscribing? Commenting? Posting?
Also what does “downvoting communities” mean? People go in and downvote every post?