Back in the days before I got into SWDev, I was working as eventtech(sound/light), which is quite a shady buisness at time. Most companies only have minimum employees and hire freelancer when needed, for events obviously. Anyway since not all events are successfull, paying and agreements may not always be honoured, which results in lot of backtalk and rumour regarding liquidity and/or payment practice of said companies. Anyway of course this was also mirrored in online discussion of specific forums, for Germany especially in the PAForum. The answer from PAForum to counter fake accounts was actual proof of identity, by sending a copy of passport and a phone call. This made this forum no1. for jobs and feedback about companies, since people needed to add their reputation for it. Services are hard to scale and need a lot of moderation but for specific needs it may make sense.