We're well aware of the potential shilling issue you've pointed out, and are (and have been) keeping a close eye.
But the best way to handle such things is to email us at email@example.com (preferably with the URL of the problem posting). That way if we HAVEN'T noticed a problem, whoever's on duty can immediately check it out.
Publicly accusing a shill will likely start a flame war of indignant denial, etc, or perhaps antagonize an honest poster. And it's certainly off-topic. So please help us out via email; let's all work together to keep the boards honest. We are grateful beyond imagining to users who point out problems, nastiness, spam, etc to us via email. Our all-volunteer skeleton staff needs help monitoring this inundation of postings!
Please don't reply to this posting; address any further discussion to Site Talk so we can keep this Outer Boroughs board chowcentric!