I don’t know about other designers out there, but when one of my clients has someone in-house that’s ‘helping’ with the site or installing backend interfaces and that kind of thing, it just makes me cringe when I get a page back that I carefully put together (indents and all) and find it triple-spaced with a nested table dropped right into the middle of my carefully written CSS.
If I reformat it, sure enough that works like a pheremone to bring the ‘editor’ back for more. Maybe to throw in a few more 3-deep nested tables just for fun.
Call me obsessive, but I like my super-clean, super easy-to-read code. When it gets mutilated even before the site launches, it makes the hair on the back of my neck stand up.
I don’t like to think about what happens to it after I turn it over to them. That’s a nightmare I choose to avoid.