To me the issue is that so many people try to make a complicated issue black and white. We have age of consent laws that are just too simplistic. When you say a child can't consent. The issue is that it's impossible to define the dividing line between "child" and "adult". I'd say prepubescent guys are clearly "children". But everything between 13 and 18 is a question mark (as is reflected by the varying age of consent laws).
Some guys are just into older guys (for whatever reason). If they realize that at a "young" age then it gets really fuzzy. Unlike guys who are attracted to guys their own age, they really have no way of exploring their sexual desires. IMHO, it's a mistake to make guys like that feel like victims when what they're doing is completely normal (for them).
On the other hand there are cases which are clearly sexual abuse and they have huge repercussions for the victims. IMHO, the mistake is to think all the sex kids have with adults is abuse on that level. Based on the poll above about 7-10% of gay guys are victims of real abuse, and another 15% may have encountered it but find the experience resonates with their emerging sexual desires.
Most important is to talk about it and understand that different people have different experiences. It's also vitally important to take real abuse completely seriously and punish the perpetrators.