I actually think that Jackson did "bother" Culkin. I have a hunch Culkin was lying. Watch for his wall of denial to crack in a few years.
I wouldn't be surprised. It sometimes takes decades for people to be able to deal with these types of issues. Look at how long it took many of the victims of the pedophile priests to come forward. The other issue that many of these young victims may be dealing with is that Jackson is a man and they may be afraid of coming out as gay, or as being seen as gay. This would be an additional problem or stigma for many of them, especially in the Hispanic culture, which I understand is very conservative in this regard.