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Yes there is. There are more than one, in fact. People who make accounts through Steemit to get the delegated SP, so they can vote, provide a phone number, and those that do this to create botnets use fake, temporary numbers.

2FA ends both creating accounts this way, and having more bots than you have phones.

Anothe mechanism, which I personally detest, is captchas, at least a temporary fix, until AI gets smart enough to beat them.

You're smarter than me, and can prolly come up with even more.

Then how do you propose to deal with one bully with lots of power hurting the whole community? Because now that he's done with me, he's targeting utopian-io.

I'm not sure what power you think he has, beyond the ability to inflate the vote count numbers, which is the same power that anyone has (anyone can create as many accounts as they wish).

You're seriously implying that trashing someones rep, and attacking their rewards, doesn't even exist?

That's ridiculous, and insuperable. Perhaps you could enlighten me, if I've misunderstood your coment.