Some people feel that this is a massive part of their identity, and as such believe they are one gender while biologically the other...figuring the monetary cost while prohibitive, is actually worth ending the issue, my solution is just to change the sign.
No. It's not worth it, to pander to some definite minority loons. If you really want to pander, then how about checking the sale of alcohol to Muslims and barring it if they are (as it is against their faith)? Although Muslims as a whole would like that, no! Not worth the hassle. They're just going to have to deal with it, same as 2.5 million Muslims will have to deal with no governmental barring of gay marriage or transexists being pandered to here, offensive to the Christian and Islamic (probably Hindu and Jewish, too; being gay is criminal in India) faith.