The only issues I can think of would be caution related to what material you lay them on. I had a friend that lined his cabinet with some thin foam matting and after some time it deteriorated and stuck to some of the guns. He was able to clean the metal surfaces with no problem, but it was still kind of messy.
A major source of objection to a free economy is precisely that it ... gives people what they want instead of what a particular group thinks they ought to want. Underlying most arguments against the free market is a lack of belief in freedom itself.
- Milton Friedman