How can contracts be anonymous?

[Steve K.]

3 times in just the past week I’ve witnessed sellers discriminate against buyers because of either race or sex. Humans simply can’t be trusted not to discriminate if given the chance. We’ve put laws in place to make discrimination illegal and have gotten rid of “love letters” already but when the name of the buyer is on the contract, it’s still too easy for sellers to discriminate, and too hard to enforce. How can we make contracts anonymous to limit this behavior?