Given that JW employers are allowed to massively discriminate against worldly people in employment, why shouldn't worldly people be allowed to balance
things out by discriminating in favor of worldly people?
You've said this several times in this thread, but it's not correct. You seem to be referring to JW owned companies that only hire other witnesses. Mormons and other insular type religions have small business owners that do this too. In reality, what they are doing is hiring from their circle of friends and acquaintences and people their friends and acquaintences reccommend. Because all of their friends are JWs, you can't really separate the two. And it's not illegal to hire only people you know that you or have a mutual friend with. Now if they advertized the job and had a lot of people come in to interview and only hire the JWs, because they are JWs, that would be illegal. But I never knew any JW owned business to do that. When they want to hire someone, they just put the word out. They don't put it on monster.com
On the other hand, I don't even know how you would implement what you are suggesting about warning employers, if one could get past how offensive it is. It is illegal to ask someone what religion they belong to in employment applications or interviews. So how would they even know? If anyone asked me what religion I belonged to on a job interview, I would walk out of the interview immediately and report them.