Fair point, if that works with a guest account. I was thinking along the lines of, if I have write access to your .bashrc (or a multitude of other config files

Fair point, if that works with a guest account. I was thinking along the lines of, if I have write access to your .bashrc (or a multitude of other config files that you as an unprivileged user have write access to, and can be used to trick you later into running code of my choosing), all bets are off.