If you think for a moment, you'll realise that it's irrelevant whether marriage is important to you - it's important to many.

So when a person wishes to deny this important institution to a minority, they are creating an out-group and discriminating against them.

By that logic, we can put those discriminators themselves in an out-group and discriminate against them. We can deny them institutions such as directorships. Fair's fair.

It's more than fair - despite what conversion camps want to sell, being queer is an intransigent characteristic. Being a bully is just a choice. Discriminating against bullies is as morally just as discriminating against the incompetent.

Obviously it's fine to campaign against marriage.