What are some of the rules about the Internet that were taught to you but are now completely ignored?
For me, it was that the Internet never forgets and that you should never enter your real name. In my opinion, both of these rules are now completely ignored.
I learned as a kid playing star craft that there are noobs and newbs. Newbs are people new to a game who need help learning. And a noob is someone who has played for a while and refuses to learn and would rather troll.