I disagree... I don't think it will be so bad if we don't have steemcleaners per se.

The whole point of curation is that quality content gets voted up. If it's truly a crap post then nobody will be voting on it and it will disappear into nothingness anyway. For example, on my Feed I don't get any spam or crap posts. And when I do, I unfollow that person. Problem solved?
This is how Steemit is intended to be I think?

If we're banning people for posting a referral code for a project that they're excited in, under the guise of 'it may be a scam'... then seriously we should start banning anybody who speaks scientology, or spouts conspiracy theories too.. The whole point of non censorship is that nobody can tell you what to talk about..