An Englishman's home is his castle?

I can't help but think that the couple who were recently fined for refusing to allow two gay men to share a bed under their roof are not themselves victims. I believe that it is wrong to deny them the right to pick and choose who they like to lodge in their house, on whatever grounds, without fear of persecution from whomsoever it annoys. What if a maiden needs to earn a living by letting rooms and has no desire to accept into her home a man with known record of abusing women?  This ruling is bad law.