What a poor research, you are mostly framing completely legit actions with dubious sounding words like "grey area", "sneaky" and combining different things which are not related to each other.
E.g. self-voting is not forbidden (depending on the circumstances), leasing is not forbidden, upvoting each other?
The values of these votes are ridiculous compared to the self-voting happening in large scale by the whales. I suggest to turn your attention where it really matters.
It is so easy to kick someone with a small stake, try to do it where it is more appropriate and leave engaged users alone.

Why are you hiding under an alt account, by the way?