Same-Sex Couples and Communion

A lesbian couple in Wyoming has been denied communion by the local bishop after going public with their opposition to a state ban on gay marriage:

[One of the women] questioned why Catholics having premarital sex and using birth control are not barred from receiving Communion, too. But the parish priest said the difference is this: The other Catholics are "not going around broadcasting, `Hey I'm having sex outside of marriage' or `I'm using birth control.'"

As same-sex couples become more accepted in society -- and thus more open about the nature of their relationships -- I wonder whether their exclusion from communion will become more commonplace, or whether such couples will leave the Church before they have to be told.