There's a difference between an argument and a debate. According to the New American Oxford dictionary, a debate is:
a formal discussion on a particular topic in a public meeting or legislative assembly, in which opposing arguments are put forward
Meanwhile, an argument is listed as
an exchange of diverging or opposite views, typically a heated or angry one
Debates are meant to be respectful, formal(somewhat, this is the internet after all), and logically valid. Yes, a debate can get somewhat heated at times, but you must refrain from logical fallacies, invalid arguments, and personal attacks. If you simply make invalid accusations, wrong assumptions, unbacked statements, and irate attacks, then it's no longer a debate.