Yeah, I don't like it when people "hide" their other friends, either. If I already know the person pretty well before I add them, then I don't care if they have their friends hidden. But yeah, if it's somebody random and sends me a request to add but they have their friends hidden I will usually deny the request.
**Sidenote

What I hate even more is those people who have an automatic friend add tweak in their profile so that just by view their page you are added to their friends.

When I visit a page and I'm automatically added as a friend....I delete the "friend" then block the user.