You're right. It would be great to see some sort of account verification done on the blockchain. Their may be a solution for that at some point in the future. I imagine when blockchain Identities become a thing it will completely solve the fake account spamming.

On the vote buying front... agreed. It clearly doesnt bring the best content to the top. It brings advertisements to the top. Communities may be the solution. They can be tailored to each groups needs and wants with SMT's. It could be a huge shift. Interesting times to say the least. I'm proud to be a part of it.