Hello community, I noticed a business using a local guide account and sadly 1-star rated clearly what is a competitor’s business.
It sounds like the protocol is to report here (although it was unclear as to which thread/group to post…how-to?) and then to tag a moderator, soooo @GeorgesHR , tag, you’re it! 
Did I do this correctly? Please alter my post if I did something incorrect. Thank you!
Hi @DustinSteller this is a clear example of violation of reviews guidelines. The review should be reported using the standard tools by the business owner, if you can contact him.
@DustinSteller Great question!
@LucioV That makes sense - do you know offhand what the policy is for self-review? For instance, if someone set up a GMB, and were also a Google user or Local Guide, are they expressly forbidden from posting a 5-star review of themselves? And if so, should we attempt to police/report those, as well, in addition to the nerfing-competitors 1-star reviews?
Apologies if that is written somewhere - I searched briefly and didn’t find anything conclusive.
@kmichaelcook sometimes could happen to give out a self 5 stars. It’s easy, Google Maps continue to propose to rate own place… but I think that there is no particular guideline that don’t allow apart the conflict of interest rule. But I think that should be blocked by design!
https://support.google.com/contributionpolicy/answer/7400114
Conflict of Interest
Maps user contributed content is most valuable when it is honest and unbiased. Examples of disallowed practices include, but are not limited to:
Reviewing your own business.
@LucioV Aha! Great response - that makes sense, but to my mind, it seems like a gray area.
i would definitely report someone if I saw them giving 1-star reviews to competitors, but based on this documentation, I would not feel comfortable reporting someone for giving themselves 5-stars. It seems like without all the information, I could wind up doing more harm than good.
Thank you for the response. That would be a conflict of interest, correct?
Yes, of course. It’s a conflict of interest.
But the point is that own business pop out in contributions page every moment, and it’s easy to make this error without any real intention to cheat.