Mailing lists Sending a personal message to the list instead of mailing it just to him or her. Believing Netscape is the only client people may use. Use Frames to make the pages unreadable for many users. Putting publicity for Netscape on your homepage without being paid for it. IRC Asking everyone for op.
Internet Believing Internet is run by one company.
Believing one can access the Internet via Microsoft Network. Calling Internet a data-base.