I'd like to suggest that some sort of validation process be done before someone can advertise a product or service for sale here.
Historically has been a move in that direction where the validation can be obtained programmatically Completely vetting all items for sale does not seem feasible to me to a site that is free to users. We always suggest members use due diligence in their business dealings.
You're probably right; I just get so irritated with these posts offering "PR 9 and PR 10 backlinks" for sale on obscure websites, by individuals who refuse to let you visit the site and check the page rank; or these folks trying to sell a "turnkey" website "guaranteed" to make you money, and expecting you to pay for it without knowing what it is you're even paying for. Scam artists are a nuisance and not everyone has the sense to verify what they pay for and it really pisses me off when I see someone I know for fact is scamming.
I just got an email that offered a 25 million dollar investment into my one man band freelance business. Should I take it? Seriously though, there are scams aplenty and anyone would be foolish to think that any site offered fool proof protection.
I think scammers don't even take some time off to study their target market a little. They just have these huge mailing lists and probably some program that sends such spammy mails in bulk.
Actually, these days, I think that many spammers are victims, as well. Someone convinced the newbie spammer that buying and sending out a million emails will result in an ROI when, in fact, there is virtually none these days. That said, I remember a marketing colleague doing research on this very topic ten years ago (it seemed like spamming was already old hat back then), yet the spam continues. The most sophisticated (and potentially successful) scammers that I come across these days are the ones that took the time to research the business that they are targeting and makes the email look like an official communication from a vendor/supplier/customer that the business works with. I have seen a few of these attempts and they looked really good.