There's a lot of power in executing data - generating data and executing data.
On the one hand, the press, television, and movies make heroes of vandals by calling them whiz kids.
In fact, we started off with two or three different shells and the shell had life of its own.
The X server has to be the biggest program I've ever seen that doesn't do anything for you.
No amount of source-level verification or scrutiny will protect you from using untrusted code.
That brings me to Dennis Ritchie. Our collaboration has been a thing of beauty.