[gcaldani]

sidusar, i have to correct you about first deserters.

You just need exactly -50.00 fame to stop they kos you. Sometimes you see -50 in your fame list and tribes that still attacks you: that's because the fame is not exactly -50.00 but a bit lower (ie: -50.01). Remember, decimals are not shown.
I'm sure because I had -56 with them and to stop aggro i just did some mission for them to reach -50 and now they don't attack me.

Generally -50.00 is the required fame to stop kos, regardless of the faction, in fact even being karavan i can use a lot of kami tribe camps just because i did mission for them and managed to get at least -50.00 or higher if not capped.

Some strange behaviour (ie: siblings of weeds, where some npc don't attack at camp and some other attacks, regardless of the fame) is just a bug and already ticketed to the dev team.

x mikeinspain: First Deserters and Matisian Border Guards are factioned and enemies, in fact if you do missions for Matisian Border Guards you'll lose fame with First Deserters and vice-versa. So, when you see a tribe, your first thing to do shopuld be to see the sign of the faction in the camp and then check your fame with the tribe. If the tribe is not listed, the only thing to do is the hard way: go near and be prepared to inv and run away. For some tribe, to have them listed in your fame window you need to do at least one mission for them.