The data wouldn’t have to be perfect to get a lot of useful information out of it. Even if users aren’t very consistent in their conventions, trends will emerge which could be put together to still come up with something useful.
Our hypothetical nefarious OnX employee looking for Colorado OTC honey holes could grab everyone’s bull waypoints or generic waypoints with bull in the name and look for clusters that show up across users. He could improve his data by narrowing it down by dates around his season and pins where the user was within 1/2 mile of the pin when it was made (to exclude escouting). OnX also lets you attach pictures which could be used to confirm kill sites and the geocoding on those pics to confirm locations. It also wouldn’t be hard to match user information like name, email, etc. against local guides, outfitters, and above all WKRs to further narrow down the best info.
(Note: Not accusing OnX or gohunt or anyone else, just pointing out what is possible from a technical perspective)