Why shouldn't they teach the accomplishments of those in the gay community? Are their accomplishments any less than those of straight people? They don't need to hammer into them that they are/were gay, but I see no problem in acknowledging it. YMMV
Not trying to be confrontational, just wondering if you would be ok with the schools just stating the fact that they were gay. I remember in school being taught accomplishments of christian people and I didn't have a problem with it then, nor do I now.
BTW, the other gay thread has been closed again with so many of my questions left unanswered.