Are the people who find an unfamiliar site, and then buy things using a non refundable payment method from a stranger not also the same people who would already be broke due to Nigerian prince email scams?
I'm sort of neutral on the subject matter so I don't have a strong opinion one way or another, but it seems like if someone is, we'll say gullible, to the point where they are willing to trade with someone here before signing up and learning how things work. Is there really anything you can do for them? I'm totally not against putting in safety nets for people who may be able to benefit from using them, but at a certain extent, I argue that its not worth putting in the effort, because its either going to be the Hot Russian Model that needs a plane ticket to come visit you, or the sketchy guy with autobuy links.
On your first question, I firmly believe the answer is absolutely NO. People starting out in the
BTC world are often in a totally strange new world but are way above the gullibility of the Nigerian email scam folks.
On your next comment I mostly agree but I have always believed that if it isn't a major undertaking some effort could be made to offer some modicum of protection to those who fall into this place.
Generally speaking, many forums actually tag scammers as scammers and delete their threads while it isn't 100% effective it is better than ignoring them and becoming the "go to" place to run a scam in some cases for months or years without any kind of sanction.