In a way -- yes. This is why most people are much more comfortable with a female baby sitter than a male baby sitter, and why the vast majority of day care workers are also female.
Actually, I agree with that. It seems at least sensible on the surface for, say, the Boy Scouts to exclude homosexuals from being the adult in charge of a group of boys. Of course on a deeper look at the question, it is pretty easy to lie about it, so the protection is largely illusionary. Anyone honest enough to admit they are homosexual to the Scout organization probably isn't the type that will be buggering the little kids.
Frankly, it would be far better to encourage homosexuals to be open about their orientation. To drive them underground with a constant drumbeat of hate messages is to simply remove a valuable piece of information that you could use when leaving your kid in the care of other specific adults.
Homophobic hysteria is actually counter-productive -- it doesn't reduce the population of homosexuals at all -- it just makes them go underground. You might have known who they were -- now you don't.