Of the same magnitude as the idea of drinking alcohol, shooting guns, or doing stupid things on video..?

Definitely not!

I would say that smartphones should have age filters on them, although I could equally say that in the internet age, the whole idea of sex education, gay or straight, is quaint and counterproductive.

I also agree that the far bigger issue is whether political indoctrination (I'm trying to think of a more positive way to phrase this, but I can't) of this form is justified. The impression I got from the article is that this is partially a reaction against the growth of fundamentalist Islamism in schools, where state funded teacher were caught teaching small children certain things like "Hindus drink their god's piss". Clearly, forcing schools to teach children about how lesbians have sex is going to really annoy the Islamists (although its not obvious whether this will make the problem of Islamism better or worse), but to avoid discrimination the same thing has to apply to Christian schools.

I suppose one could argue that enforcing certain cultural norms (e.g. the belief that all religions and sexual orientations are equally valid) is necessary to prevent society from breaking down into factions engaged in armed conflict with each other, which is far more important than any other issue we have discussed here.

OTOH... well I certainly don't hold either hetrosexuality or cissexuality as terminal values (my argument was purely about avoiding suffering), but I think some people, such as Azathoth, do, and it does seem rather unfair that the state can declare that your values are wrong and demand that your children hold different values.

I'm really not sure how to answer this.