Never read comments from people who don't even have a profile pic. These are the worst offenders.
This is actually the third article i am reading about comment spam, looks like the steemit community is getting vocal about it. And why shouldn't they? It is really disrespectful towards the author who did some work on his post.
They don't care, the get money for no effort mentality. You are right, I have seen a few myself. I am glad and hope that it galvanises prior to fight back a bit more!