Should there be a colour code to let guys know you're safe to approach?

A common question on GAG is, "How do I approach women?" Guys get confused as to when it's appropriate to apply women or get frustrated when they're constantly rejected.

Now back in the old days, gay men had a handkerchief code that advertised what sexual acts they were into and who they were looking for.

So would this work for women? Say for example, red could mean looking for a boyfriend, must be 6ft. Blue could mean must earn over £30,000 to approach me. Obviously you could combine colours, red and yellow = must be 6ft with own home and so on.

Thoughts?
Should there be a colour code to let guys know youre safe to approach?
Should there be a colour code to let guys know you're safe to approach?
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