When I am running my friend's place I tell them if whoever gets you angry do the following(and I had posters made up and posted them all over the shops):
1. Ignore the fellow worker if that doesnt work,
2. Tell the fellow worker not to bother you, if they continue
3. Tell fellow worker if he/she bothers you again your getting a boss, if it still continues,
4. Get the boss and leave the rest to him/her.
I actually fired someone that had a temper. I told him to take a long lunch I'll punch him out at the correct time(about 45 minutes for lunch time). He came back instagated by throwing a tools around co-workers complained again, I said to quit, when I come back from the errand if I stop there is still trouble, I am firing someone. The instagator got fired.