@wc and a site the entire purpose of which is to store reg details in order to shame the drivers
Not the purpose at all - my sole motivator is in providing additional evidence to somebody who might be involved in an accident. So you get hit by a car. You check the database, discover said car has been involved in x number of clearly dangerous incidents - supporting pressure for the police to do something about it. It may not stand up in court but it starts a movement to put social pressure on the powers that be, to say that we are not happy about our current second-rate treatment on the roads, that we are not happy about being injured or killed and nothing gets done about it.
If I were to implement this, I would 100% want to make sure it wasn't a cesspool, hate site, anti-car site, vigilante meeting point etc etc. The meat of the conundrum for me is in figuring out if such a thing is possible, hence my posting it here to bounce it off others in the same position as myself.