The assumption they're making is "interactive incest and sexual exploitation games influence people's real life behavior".

In purely hypothetical terms, what would we if there was evidence for this? I can see some folks standing by their ideals and concluding that even if this was true, we shouldn't ban these games, while others would conclude that there is a moral obligation to future victims to ban them.

How would you behave if you shared the belief that incest and sexual exploitation games influence people's real life behavior?