hammers, crowbars and remailers & Leahy

What is the difference between an small hardware store owner selling a hammer and a crowbar to a guy that will commit burglary and a remailer owner providing services to , say, the same burglar who wants to sell his stolen goods. Would an anonymous phone call notifying the hardware store owner that somebody will buy tools that will be used to commit a crime be significant? Any comments? JFA Typical govt reasonning: The first cause of death is life, therefore life should be outlawed! Yeah, let make a new law! It'll be fun!