Fudging the data in any way whatsoever is quite literally a sin against the holy ghost of science. I'm not religious but I put it that way because I feel so strongly. It's the one thing you do not ever do. You've got to have standards.
I never smile when I have a bat in my hands. That's when you've got to be serious. When I get out on the field nothing's a joke to me. I don't feel like I should walk around with a smile on my face.