The one thing I find compelling about the Catholic Church scandal and how it should be applied to other organizations that deal with minors is that the percentage of the child abuse that is homosexual in nature, as opposed to heterosexual, is not commensurate with the rate of the population that is homosexual, as opposed to heterosexual. If, in fact, abuse is as likely from homosexuals as heterosexuals, I would expect to only see about 2-4 % of the abuse victims of men to be boys.
Of course my final reason that I do not trust homosexuals around children as much as heterosexuals is theological, that is, the nature of the sin of lust. Lust (like greed) for either sex or power is never satisfied for long. If given into consistently, it seeks greater and more perverse avenues. In this, homosexual lust is a greater danger, being intrinsically disordered by its very nature. Heterosexuality can have holy and proper avenues. I know this may seem unfair, and maybe it is, but life is not fair and we all have our own areas of temptation. I would say one who is promiscuously heterosexual would present me with the same concern.