I inadvertently caused a VERY VERY large corporation that is a household name to change its TOS through one of my little automation scripts. By little, I mean a few dozen lines of code and some ingenuity.

The corp in question: Begins with V and ends with z and likes to screw customers.

All above board, approved by several levels of various teams/depts. The head of a specific dept sent me several strongly worded texts/voicemails. He was rather expressive to say the least over something that cost $0.

I could go in more detail but there are a few NDAs I signed.