I believe it is an idea worth considering. As much as “gay” marriage disgusts me, some overlook the Scriptures that lump homosexuality with adulterers, fornicators, and drunkards. They are all sin! However, I’m not in favor of the Mary thing - she can’t save anyone - it is Jesus they need to promote And, yes, this could be an opportunity to witness to these lost souls.
That’s being morally equivalent. Should a bar owner or liquor store owner also take the money of drunkards and donate it to a temperance lobby, instead of cutting them off?