My comment was in response to a specific comment criticizing the exclusion of certain zip codes. To my knowledge, zip codes are not legally protected discrimination criteria. I suppose one could argue that they can be a proxy for excluding people based on criteria that is legally protected, however, that argument is unlikely to be successful if the primary motivation for using zip codes was to target those of certain income levels, which is also not legally protected.

In the future, before saying such snarky things (which are of little value to the discussion), perhaps you should read the comment you are responding to. The first sentence of my comment limited its scope to the location issue:

What exactly is wrong with excluding certain areas from seeing your ad?