The best part of the fediverse is that anyone can run their own server. The downside of this is that anyone can easily create hordes of fake accounts, as I will now demonstrate.
Fighting fake accounts is hard and most implementations do not currently have an effective way of filtering out fake accounts. I’m sure that the developers will step in if this becomes a bigger problem. Until then, remember that votes are just a number.
I think the best solution there is so far is to require captcha for every upvote but that’d lead to poor user experience. I guess it’s the cost benefit of user experience degrading through fake upvotes vs through requiring captcha.
If any instance ever requires a captcha for something as trivial as an upvote, I’ll simply stop upvoting on that instance.