Oh yeah I used to do that all the time. I've always been "cute" and "needed to be protected" and I would play that up like nobody's business. I'd act really innocent to the teachers and professors, really act like I'm giving it my all, and then I'd be able to get away with damn near anything because I'm "just nervous and doing my best". Hell it worked with anyone. I was smart but also "quirky" enough that even the punks of the school were my friends and they'd help me cheat regularly.
I think my magnum opus was when there was a ridiculously hard test in class that I was sure to fail. I pulled out all the stops on that one and just started crying and then the teacher was like "ah uh maybe this test is too much, this won't count against any of you"
My parents had put me in really difficult classes and I had no choice but to start manipulating people to survive but I've never been the same since then. Now I constantly manipulate others, including my family, with the cutesy act even when I don't need to. The thrill of completely outwitting someone is addicting.>I love lying and controlling the reality in someone's mind.
Yep that's me to a T.