I find that dishonest and two-faced honestly. If I'm speaking to someone that I've begun to know and call a friend, I'm going to speak to them like I would if it was face to face. Simply because there's a barrier that separates real tone and dialect from what we would experience in reality, is not an excuse to behave differently simply because you can. If you're going to act like someone else on the internet just because it's the internet and has no "link" to who you actually are, then I would hope I never become friends or acquaintances with someone that believes they can say whatever they want without reason simply because everyone is usually anonymous.