[benj111]

"Otherwise, everything is caveat emptor"

Does it even reach that level?

Buyer implies contract -> contract law -> rule of law -> government.

And caveat emptor is a legal concept which again reinforces the above.

What's the Latin for 'Trade and hope the other guy doesn't have a bigger weapon'?

[AstralStorm]

Closest I can think of is "Si vis pacem, para bellum" ;)

Or the Roosevelt quote.

Anyway, killing traders or customers is a good way to get out of business. (Only if there's enough "suckers" or your product is irreplaceable can you ever consider it. Such as with certain drugs.)