I'm about 15hrs in and completed Act 1 which felt short to me. But I noticed a lot of mission icons on the map. But I'm not sure what I'm doing to provoke law enforcement but they spawn right behind me and I have no chance against them. I assume this is a bug and its annoying as hell. Maybe I should just wait for more patches and fixes because there's a great game here. The game world needs special mention because its designed really well.