Should firearms dealers be held responsible for straw purchases?
No. A straw purchase is when someone who is able to pass the FBI background check lies to the firearms dealer about who the gun is for. Unless the straw man somehow tips the firearms dealer off, in which case the dealer would refuse the sale and contact the ATF, there is simply no way for the FFL to know that the purchaser is lying. This is why law enforcement calls it a straw purchase and not a straw sale.