I give them a great deal of credit for acting - that is the one area I give them their due. Particularly since the audience is often so willing.

Details don't matter - I do it all the time while teaching - make up past students or mush a few together for a purpose and I can give great detail about it should it be necessary for my point. I am terrible at names and often can't remember someone who has taken 4 semesters with me. And my sections are not that large.