Take this post for example: https://www.reddit.com/r/northernireland/comments/1ll6ocg/see_it_say_it_censored_kneecap_is_not_the_story/
Speaking from experience, people in Ireland are overwhelmingly pro-palestine.
There is this user in the comments: https://www.reddit.com/user/EntireCourage308/
Its a nearly year-old account, it started posting about a month ago, it made some innoculous posts, then pivoted to posting far-right misinformation in the r/northernireland subreddit.
There’s loads of other accounts just like it.
lemvotes.org
Admins can see who voted on what, as can moderators.
Instance admins would be less stretched out than reddit ones, since people are split across instances.
Instance admins also have motivation to remove them, as bots make money for reddit.
bots use upvotes on reddit as a way to gain legitimacy to thier account so they can start spamming thier business posts.