Internet Tough Guys are the people who you will find in chatrooms, usually having some sort of badass name (e.g., Gladiatior007.) and an intimidating avatar. They'll contantly be bragging about how they beat the shit out of people and steal their girls or are a professional wrestler and weigh 400 pounds of pure muscle, and they'll often say things like "If I knew where you lived, i'd kick your ass." and other bluffs. 99.999999% of these people are socially awkward, weak people with few friends in real life. They are very easy to troll, and pretending to be an ITG is also a fun way to troll people.
Muscleman308: I'll find out where you live and beat the shit out of you!
Lolz:Internet Tough Guy much, faggot?
The theory that, no matter on what forum, if something mildly controversial comes up, Nazis will eventually be brought up as a counterpoint, and discussed.
"The court ruled that the 4th-grader passing out Jesus fliers was ok."
"I bet they would have ruled differently if she'd been passing out Nazi fliers."
"Yeah, because Jesus and Hitler are totally the same."
"Jeez, the Nazi Theory of Internet really surfaced fast on this one."
A large, unregulated mass of extremely diverse content, consisting primarily of pornography, gaming websites, livejournal accounts, and those fucking annoying popup messages that won't go away on angelfire websites. In addition, the internet also plays host to several bizzare subcultures, including, but not limited to, goths, furries, otherkin, linux nerds, and conspiracy theory nutballs who all like to design their sites on the exact same formats as one another.