I have a friend who's not very computer savvy, and uses an iPad. We wind up doing constant IT support for him. His biggest foible is that he goes into Contacts, accidentally selects "groups", and then gets flustered and unchecks the only group he actually has. Then the next thing you know, he's on the phone in a panic because he can't find any of his contacts. This has been known to happen more than once in a single day. It doesn't help that he lives several hundred miles away, so all this support has to be done over the phone. His son helps when he can, but he's not always around.
Is there a way to simply disable the "groups" feature? He doesn't need it, and it's causing everybody involved a lot of grief.