No.
Forcing me to check the background of some body to buy a tool is ridiculous. I am not responsible for the intent of another person. I will concede that i may be liable in some way if i know that the other person will do evil with that tool, but ultimately the responsibility for ones action lays squarely at the foot of the perpetrator. If they are not legally able to possess a firearm they, and only they, should be held accountable for acquiring one.
Forcing me to check the background of some body to buy a tool is ridiculous. I am not responsible for the intent of another person. I will concede that i may be liable in some way if i know that the other person will do evil with that tool, but ultimately the responsibility for ones action lays squarely at the foot of the perpetrator. If they are not legally able to possess a firearm they, and only they, should be held accountable for acquiring one.