I think that all your questions are broad in that there is all kinds of abuse, so with that it takes looking at different kinds of abuse and then how to prevent that kind of abuse.

Typically, an abuser targets individuals that are niave, very young, children are victims a lot and so are the elderly as well as young niave teenagers. Most predators, even animal predators can identify potential victims. Education is important along with being observing and reporting anything that a person thinks is off. Predators look for soft targets any sign of defenslessness and they typically get involved in areas where they know they can find their targets.