If the user wants to delete a comment, that should be respected. Even though it can satiate curiosity, it also removes peoples ability to rescind comments they may change their mind about later.
This is certainly functionality that should not be kept.
Code can be decompiled into code that can be recompiled, but compilers translate the human readable code into code that is easier to understand for machines. So decompiled code often ends up being nearly undecipherable for humans, and can take a long time to try and decipher.