QUOTE(King Of Beasts @ Feb 24 2013, 07:24 PM)

Wait, I know this!
If an NPC's aggression is at least 6, dropping their disposition 5 points below the NPC's agression will cause it to attack.
That's correct, at the beginning I thought that nobody will attack you if you provoke them because one of my previous characters (snobby Altmer BTW) insulted almost everyone he met and their disposition dropped to 0. Yet none attacked him. Then he insulted Eugal Belette (that guy from Chorrol who has a dark secret) and he attacked him - I was curious what was the reason and checked in the CS - he had aggresion set to 10 while all previous insulted characters hd 5 or less.
QUOTE
Some characters (like Kahreem of Weet and Luci Pheria) will even do a 'negative' Speechcraft, intentionally insulting an NPC, making them hate my character!
Falador doesn't need to do that, his high infamy makes him hear comments like "This scent is foul", "Go away", "What do you want, treehugger?" et cetera all the time.