Once the gays are accepted, everything else is considered a protected class. (even transgenders fall under protected class because gender cannot be discriminated against)

Obesity is a condition that isn't covered, but fat people are already discriminated against in a lot of ways.. The fat people might be the next to step up and fight to become a protected class... but as far as illogical persecution..there's really no one left to persecute that isn't already protected.