<p>If you think it shouldn't, explain why.</p>

<p>If yes, how deep should the guidelines be in your opinion? For example, indentation of code should be included?</p>

I believe having a consistent codebase is important. It increases the maintainability of ur code. If everyone expects the same kind of code, they can easily read and understand it.
Besides it is not much of a hassle given today's IDEs and their autoformatting capabilities.
P.S:
 I have this annoying habit of putting my braces on the next line :). No one else seems to like it