Fedigrow

If it's everything (in a community/profile) maybe, particularly if they don't have any contributions elsewhere. Or if it's actually something heartfelt/personal I can see being more touchy about it, less so with bot-like aggregation or reposting old content etc.

Because otherwise, it's not going to be obvious where the line is when you add in time and % of content. If you're using a bot/script to detect voting, you're likely going to ban users just for casual browsing (even if they could explain their votes). Especially as an instance ban purges a user's account (to users of that instance) as if they're on the same level as an SEO spammer. Does a voting disagreement mean the rest of their account is invalid?

I don't know if it's fedi incompatibility or just 0-transparency moderation, but dubvee might be doing this but it's unclear as they seem to be just handing out silent bans (no ban reason stated).

If their only contribution is downvotes, then it's not really a PTB IMO and should be done.

PTB?

While lemmy is still small I think its worth asking them what's up. Is there a timeout/suspension function? Suspend their account for 30 days.

Have you tried messaging them?

How do you see who is up and down dooting posts?

Yep, they get banned. End of story. Though I'd be willing to unban them if they appealed and explained their behavior. Or if there was a mistake on my end, obviously

It’s not considered powertripping as that is a form of vote manipulation.

If it's only downvotes, then a ban is justified.

If they only downvote everything, I think they deserve a ban.

I'd say just ban them. Doesn't look like a healthy relationship for either side. Worst thing that can happen is they complain and you get to know the reason for their behaviour... And if they're under the impression it will get rid of the posts, banning them will accomplish that, so win-win.