Pro-gun article in the Philadelphia Lawyer magazine
Right here. The author, Jonathan Goldstein, notes an experience many of us have had. Straw-man buys are a State felony there. Yet he found that prosecutions on that ground numbered 1-2 per county, per year. He raised that during a debate where police officials were saying straw-man sales were a terrible problem, and they needed more gun laws to deal with them. And got the reply that, well, actually prosecuting those cases is a lot of work.