What if a passenger asks to see the flight papers?

I often ask for and get, the printed flight plan.  I ask the flight attendant or one of the flight crew when they're walking around the cabin.

I've only asked for them on international flights, but I've never  had anybody tell me I couldn't have them. They just can't always tell me when I can have them.

I tell them I'm a flight simulator enthusiast and would like to replicate the flight.

What evil am I going to do with an old flight plan?