Tests are all fine and well, but you guys seem to be forgetting that someone would have to write the test, review the answers, decide whether to allow the person access to the forum or not, then actually go into the admin panel and do so. All of this takes time and money.
The alternative would be to have an automated test, which would require a programmer to write the coding and scoring algorithm, and integrate it into the scripting and databse. Again, this cost money.
Someone would have to write the test, yes, but the rest can be avoided. I don't think that the test should be used to allow or deny access to the forum. All I see that doing is leaving the clueless in the dark. I don't even think such a test should be mandatory. I just thought that it would be useful to have something readily available to sellers with which to test a potential customer. Copy/Paste it into a PM, send it to customer, let them finish it, review their answers, decide on whether or not you really want to sell them. Pretty much the same as what people now, just with a more standardized resource.