On topic: I'm very moved by everyone who has made these types of statements. I've made statements like this, without the homosexual context, to bullied students as well, and I don't think kids get to hear this sort of message enough from adults. Both age groups tend to ignore the fact that adults were once kids and kids will one day be adults; sadly, the transitory nature of any bullying or abusive situation tends to be lost on the victim, which gives the abusers even more power.
Off topic: Kids are more aware, I think, of non-heterosexual lifestyles than, for instance, when I was young. I didn't know any adult in my life that was openly homosexual or bisexual, though as an adult I learned that a few were closeted. In contrast, the children in my family now are aware of what gays and lesbians are even as young as 7 years old. Being more exposed to the fact that one does not have to be straight makes kids more educated about sexual preferences and makes them more easily and earlier come out. Honestly, I was aroused by female images all through my developmental years, but did not identify myself as bisexual until my 30s. Had I been better educated and had more openly gay or bisexual role models in my life, I might have made that identification sooner.