I'm sure this point is also made in Mike Lew's book too, but I don't have my copy to hand to look it up. The "vampire myth", as it's called, is also debunked in a great list of CSA myths that's right here on the site - or used to be here. I can't find it at the moment, but it must be around somewhere.
As you start disclosing and losing your sense of shame and guilt about the abuse, guys, you do encounter people who will quite innocently fall into the trap of the vampire myth. One of my closest friends on earth did that; I disclosed to him and he almost immediately asked me if I wasn't afraid of becoming an abuser myself now. That would have freaked me out pretty good awhile back, but now I can see it as an opportunity to set someone straight. That's what I did, and my friend took it all very well and was grateful to me for clarifying the point for him.
If you find yourself in this situation it's pretty easy to illustrate the false logic of the vampire myth. "Most abusers have been abused as boys, therefore abused boys are likely to turn into abusers as adults" - that's like saying the following: "People who drown got wet first, therefore people who get wet are likely to drown".
I like the emphasis in this thread on educating the public without taking offense. We get a lot further with the public if they see us coming at them with concern that they be properly informed rather than indignation at an honest - and VERY common - mistake.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)