I was sure there is no reputation system in Skyrim. I RP a really BAD character atm, killing all non-essential people in cities. Then I clear my bounties one way or another and I'm good to goo. But not exactly - some RANDOM people become hostile to me. They don't attack, but refuse to talk, they only say "Go away", "I hate you", "Don't try anything stupid" etc. etc. Some also beg for mercy. That's all fine, but I can't advance some quests! For example, Anton Virane must be interrogated, but he won't talk with me. Setstage command can help sometimes, but... So I thought this is because of my crimes, but then in Windhelm, where I did no crime at all, some characters are also randomly hostile to me (despite I've finished civil war in Ulfric's favour). Namely Jorleif and Wuunferth, and they are necessary for the quest Blood on the Ice!!