@Yowhite They don't ban based on whether you respond via typing, this isn't 2002.
 
	"Jagex Moderator Comment" is on most, if not all, bans. It's not personalised.
 
	Jmods don't go undercover as other accounts, they have no need to. They can set their own visibility to zero as well as a variety of tricks that could "bust" a bot as you say. Also their time is better spent analysing data that they record and detect from rather than singling out specific person who is firemaking of all skills...
 
	As for people being unfairly banned it's not unheard of, especially when they're aiming to maximize EHP.