I cant give you the exact answer Kitty, but it's something to do with motorcycles I seem to remember.
Peacekeeper (name of motorcycle) _ keeps the peace
Bad boy (harley davidson) disturbs the peace
The other may be Vigilante _ takes matters into it's own hands
sorry I cant be more specific, but it should give you a start at googling
If each name is by the same manufacturer, I suppose that would be the "stable" or the "corral" they came out of.
http://www.hogs4sale.com/items/item4363.htm
http://www.bikez.com/bike/index.php?bike=1232
Good luck. Henry.