What is it specifically that leads you to believe that this is true? I've been reading about this issue and it appears that both the cartoon show and the school video are free from anything that could be construed as the "gay agenda." Please inform me.
Any site pushing sexual politics through teachers and librarians should be, a priori, reason enough to doubt their motives. The rest is entirely up to you.
My grandkids enjoy SpongeBob, I see nothing wrong with the cartoon, I see plenty wrong with the We Are Family fifthe columnists.