Some time ago, when I was analyzing various data about Steem (using http://steemsql.com/) I encountered disturbing behavior. 
throwing in all the accounts of different pictures (from a different side, not their own)
voting on these posts using these accounts
Example:
His second comment suggests that he may, however, reflect. The reality, however, looks as follows:
Some of the posts have already been noticed by some bots, but only a small part:
Why am I writing about all this? Well, because it's an obvious action to the disadvantage of the whole Steem community. Remember that it all goes from the same pool, so it's not like nobody loses. Everyone is losing. First of all, we deal with voting on each other using multiple accounts, and secondly using someone's work (images are copied from a different page, which in itself is abusive).
Steem is struggling with many problems and this is, in my opinion, an example of one of them. I really wish everyone here best, but the system abuse should not be a way of earning quite large amounts.
There are so many interesting initiatives (utopian-io, steemst etc.), so many people put in a lot of time in community development, and others unfortunately try to win without adding anything worthy of themselves.
As it's just my, probably not significant sentence, I invite you to the discussion.