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Some of the highest rep accounts are some of the worst users on the platform. This is true.

Exactly...and isn't the rep score just based on number of posts? If so, a troll bot could get a really high rep score pretty fast.

No it's based on all votes/downvotes an account ever received.

Ohh gotcha...do self votes count? If so, couldn't a bot just self upvote?

Possibly, but it takes some serious SP to get a high rep.

That can be easily resolved at any time by those with even higher rep.

Unless the highest reps are the worst ones. Which is mostly the case here.