I'm not saying that an email hack is far-fetched, I'm saying that worrying about this specific consequence of an email hack, while otherwise not worrying about an email hack, is far-fetched. It's like refusing to go to a specific store because you're worried your car engine will catch fire. If you have bigger problems, deal with those first! Don't use them as an excuse while not trying to fix them or take them seriously in any other way.