I was also looking for this when I started using steemit a month ago.
And about the spammers, there are many ways to deal with them. Steemit platform still has many good tough features to be added.
I will share my thihen on this topic. Yes comments will become less @embutv, but I think most of the spam comments will be decreased. Most spammers comments on the posts asking to upvote and resteem and follow. I think that will be reduced since he/she can ask privately to the person. I'm also looking forward for this @marshalllife.
Thanks 🤙
Lols @mike50 do you know i just found a way to deal with scammers,who keeo disturbing the messagers peace 😁 😀,, well i think if this should ever be implemented, the intergrated messager,should have a feature or a button of contacting @steemcleaner or any other steemit cleaners,( @steemitcleaner) on any message sent from the spam send or The message the steemian see as spam,so steemit cleaners can look into the message sent, (note** once the spam button has been triggered to steemcleaners, the message sent by the spammers becomes visible to steemcleaners, to investigate the body of the message , for them to take necessary actions, on the spammer.