Such comments add nothing to the discussion, take up space on the blockchain and reduce the rewards for those making actual substantial comments. Basically, the people making such comments are parasites.
If you agree with a post or thinks it's great, then show that with an upvote and reward the author, you don't need to make a comment which is essentially a text upvote. If you're posting stuff like that, you may as well be a bot.
All such posts should be flagged as they're detrimental to the system. The problem is, flagging uses up your steem power. So, I propose that we setup a "steamflaggers" community that's dedicated to flagging those useless comments in order to put a stop to them.
What do you think about such a proposal?