I've been thinking about letting users make scripts for my project. What I'd like to do, is let them write and compile game scripts in C, as this would make it very easy to develop. The thing I'm concerned about, is a user could put something nasty in the script, and share it with my program. I can't think of a way to stop users doing that, unless I make a custom script language, probably visual.
Is this something devs worry about? Is it a bad idea to use C for this?