Yeah ofcoarse. You can never really be 100% secure.
Norton will protect you from major vulnerabilities, but not fake webpages and stuff.
I'm still not quite sure how your account got hacked off SkylinesAustralia though? It's not as if the guy found your email off SAU and then hacked it cause he physcially found your email off here.
It just doesn't reall make sense. You would think if someone could 'hack' emails they find off websites, they would just hack their friends because they already know them?
I don't think I've caught the jist of what you mean?