Well maybe I am missing something, but since when putting values on the opinions of others is a bad thing? Nobody lives in a vacuum.
If a little boy wants to dress as a girl for Halloween, he should feel free to so. If people have a problem with that, said little boy should not feel the need to bend to their will. This little boy is not in the wrong; it's the close-minded segment of society that is. Those who said that this costume would turn this child 'gay', need to refrain from concern trolling and open up a book and educate themselves. People are born with a predetermined sexuality and throwing the kid into the middle of a soccer field and denying him the right to express himself via 'feminine' things isn't going to change it or encourage it.