Quote - Break the TOS or upset anyone ="Ban"
Break the TOS or upset anyone 4 times, records keep for years = Life time ban
Argue with a mod or discuss a grievance in open forum = Ban

I'd have to say whomever you're referring to did not have a run-of-the-mill arguement.   I've spoken my mind plenty of times, am very opinionated and have argued with 'the powers that be' and have yet, in (what) 7 or 8 years (?) have not even received a warning.   It all depends on how you go about your disagreements. 

...... Kendra