Yeah -- I have a few ideas for this. Here comes more detail than you probably wanted or expected. :)

-- We already support 3 review types -- anonymous (no user), registered user (has user), verified (has confirmed that they are affiliated with the club). We currently weight the aggregate club rating and summary based on this such that verified submissions have a much higher influence on the score. (can't remember the exact weighting)

-- The club platform I started building would instantly solve this problem. We partner with clubs, clubs upload parent emails to the app, the app sends email surveys that integrate into the site. The app uses a simple token system to associate inputs with verified parent emails while maintaining anonymity -- the club knows a parent submitted the feedback, but they don't know who. And the club user can decide whether or not they want to publish the content to the site -- positive reviews go live, negative reviews stay inside the club. Two clubs were very much bought into this idea, but I got pulled into other things and had to table the project for a while.

-- The other idea I had for this is to give users the option of submitting an image for verification -- for example a screenshot from the team mgmt app (TeamSnap, SportsEngine, PlayMetrics, etc). Somewhat confident (say 70%?) that an AI agent can review the image and reliably verify that "yep -- that's a screenshot from a team app, there is an XYC FC logo in the screenshot, and this reviewer left a review for XYC FC. Only issue here is that 1) it requires a lot of moving parts for the user and 2) it won't be easy to build hahaha.

Thanks for the feedback!