I'm surprised so many people here are so quick to assume this categorically doesn't contravene any laws or regulations. For example:
[/i]"Title VII permits you to discriminate on the basis of "religion, sex, or national origin in those instances where religion, sex, or national origin is a bona fide occupational qualification reasonably necessary to the normal operation of the particular business or enterprise." This narrow exception has also been extended to discrimination based on age through the Age Discrimination in Employment Act (ADEA)."[/i]
http://www.law.cornell.edu/wex/bona_...ification_bfoq
Having trannies or people over 45 clearly doesn't interfere with the normal operation of a cam site, and I'm not sure 'because we want to' constitutes a particularly 'bona fide' reason to refuse someone based on their age or gender.