After I played SP to death I tried a bit of online free roam as a single player before I uninstalled it, I did quite well on some of the missions against bots. I occasionally saw another player highlighted in blue.
Then I came across some firing nearby involving at least one live player who's name was highlighted in red and before I got anywhere near I was instantly shot dead, I respawned nearby, took two steps and was dead within seconds by the same player. Spawned again and ran off towards my horse but never made it, one hit and I'm dead. The 'parley' option came up which gives you 10 minutes where neither side can shoot but I just disconnected from the game.
It seems that playing with a controller allows extremely accurate auto aim so the player who thinks he is ever so clever just can't miss, or is he using a one shot/kill hack?
The auto aim options are missing from the K&M settings and there are lots of complaints on the net. If joining a team you can select free aim lobby's but I have no real interest in online play