If someone finds it and can solo it, there's nothing "cheap" about it. They were intended to be soloed from the developer's own word.
At least on Adamantoise there is no obligation to report a a B rank mob anymore and almost all the LSes have told people to stop reporting them. If they ever accepted them to begin with.
On Phoenix 90% (no bullshit) waits for others. If the offender does not wait the expected time he gets literally blacklisted especially on A or S. A & S rarely that happens but with B the drama gets big because there is a strong sense of community with hunting and so many people do it 24/7 so the last thing you want is facerolling and fucking up the rest of the server.