I recently learned that voting on lemmy is not anonymous. Anyone can get information about who has upvoted and downvoted a post or comment.
In combination with your IP, this is a massive privacy (maybe even physical security) risk. Also, people can target you for your votes.
Sadly, this is something where I would prefer Reddit over Lemmy. Big tech scrapes data from both places anyways, at least Reddit is safe.
It’s a good thing to be concerned about privacy! While voting patterns/voting retaliation is certainly possible on Lemmy, I think following good general security practices can go a long way towards mitigating those things. (Anyone who’s new to online privacy or needs a helping hand to get started should def check out the EFF’s Surveillance Self-Defense site.)