*Slowfoot put on list marked "Do not under any circumstance, any ever ever, give mod rights to"
Seren, Gertie has it - if the system can tell the difference, then it should deal with it. The individual will be able to see a spam thread, however, they can also see a contentious thread and think it beyond the pale and delete, or be under pressure from other users to delete it. That, no matter how well intentioned, is an abuse. And that is what I don't want. It will happen; always does.
The problem needs to be sorted at the root cause - ease of setting up a new account and posting crap etc. That requires a technical solution.
*Warning - crap analogy coming* I build a car, but I forget to put brakes in. I sell thousands of the things and they crash all over the shop. I ask the general public to start cleaning up the dead bodies, because they are starting to smell and make the place look untidy. Reasonable request or should I just recall all the cars I've sold and put brakes on them?