Its supposed to scare you. Before it runs code (unless you suppress warnings) it will try to scare you again. You could theoretically destory your computer with this. It would be best to avoid any commands that make changes.
EX: open my word documents, look for ones that have my name in them, move to xyzFolder. The problem is, did it understand you wanted your name in the search, or does it think you want to search for the words 'your name'?
Solution: Open my word documents, make a list of all of the ones that contain John Smith, save that list to moveThese.txt; next command, after having manually reviewed the list, would be: Move the documents in moveThese.txt to xyzFolder.

My solution is actually a bit more complicated, it wouldn't be hard to ask for the list on screen with a confirmation prompt. I wanted to expand things a bit so people could know what they should do.

After you give a command, it generates code and shows it to you. Often even a decent familiarity with programming will allow you to trace what is happening. If all else fails, play in a sandbox!