Follow the law is what is required. Anything more and you may cross a line you didn’t intend to.So it's much better to sell the firearm to a total stranger you've never met before, don't check anything, no ID or LTCH or nothing, not even a peek, just that he/she had the requisite number of benjamins and didn't flat out tell you was a felon?
Only sell to complete strangers that you know nothing about? That sounds like you're saying that's what the state/federal regulations mean.