I don’t know of anywhere on FR or anywhere else who claims “there is no evidence of this kind of thing happening”. But there is plenty of this kind of thing being perpetrated by heterosexual men on little girls as well. Whether the percent of homosexual men who sexually assault children is higher than the percent of heterosexual men who sexually assault children is unclear (though it may very well be higher). What is very clear is that the majority of young children who are sexually assaulted are girls assaulted by men. The child pornography/child prostitution industry is very disproportionately focused on girls — not surprisingly, since over 90% of adult men are exclusively or predominately heterosexual.
The group to focus on if you want to keep children safe from sexual assault is *men*. Women, regardless of their sexual orientation, are statistically very unlikely to commit sexual assault on a child (or on an adult). Within the large category of “men”, the next layer of focus should be men who show a specific interest in children in general (as opposed to children of their own). Male elementary school teachers, church youth group leaders, volunteers for groups like Big Brothers, men who befriend the fatherless sons of neighbors, men who give private music lessons, men who teach sports classes or coach sports teams, male counselors or psychologists whose practice is focused on children, etc. And, of course, as the above example shows, men who frequently volunteer to babysit other people’s children, and men who hold jobs that focus on children in any way, thus providing cover for their spending a lot of time around children.
While your comments are quite logical, I hope you realize you are tarring by implication a very large number of perfectly innocent men who have careers or hobbies that keep them around children.
While it is quite true that men who lust after children often get involved with such things, I believe the vast majority of the men who do so are not pedophiles.
It is equally true that firebugs often become professional or volunteer fireman, but that doesn’t mean all firefighters should be suspected of sexual kinks involving the setting of fires.