It’s difficult to discern between the people praying on young adults because they want to exploit young adults or they themselves are immature (or other legal but distasteful paradigm) and those praying on young adults because they are settling on the nearest legal target.
I think the current views are sufficient. These relationships are frowned on but legal. It’s not impossible for these relationships to be mutually beneficial for both parties but it is unlikely. Having them be legal but frowned upon helps raise caution when it might be abusive or call attention to that to the parties involved.
I have no comments on the love life of Mr Di Caprio.