"I didn't like those guys before but now I really don't like them.." No one is allowed to just mess with his head. But he didn't see the guys until after the memory so when would they have done it?

"Doesn't seem smart to me...I mean some people aren't going to take too well to this kind of thing. What happens if they implant it into someone that could lose their mind completely and go on some sort of murder spree or something? Like if they found out they were a serial killer or something in their past life." Hell..maybe he was one. If his memory involved death who is to say he doesn't do the same.