Probably you have seen 
@wang comments on every post on introduceyourself tag here on Steemit. But who is @wang ?
He is the friendly user(bot) that welcomes every new user on Steemit with the following message:
But lets take a look on
As you can see he has made huge amounts of steem power and dollars just by spamming the same comment on every post.
As Steemit is becoming more popular every day , new bots will appear with the same or different strategies .
A solution should be found to stop them(the bots). All we can do is to downvote and flag their comments.