Messing with someone else's code

Sup /prog/

When I have to put my hands in someone else's dirty code I feel unconfortable. Ok, this should be the same for everyone here, however there's something that absolutely drives me crazy:
- Software generated by automatic code generation tools;
- Code binded to a specific IDE that can work only with it;

Discuss.

- Software generated by automatic code generation tools;
Fine as long as you do have the originals from where it was generated, otherwise stupid to work with.