Yes of course but I'd be against that. Feuds and disputes just don't quit happening when a country is stable. Sure they happen and sometimes you still gotta settle them instead of using it as an excuse to exact CB.
Well, it's a little odd that the "Feud" event doesn't give you a choice, anyway. It seems like if any event should, one that involves sending people a gift would be one.
More generally, though, I think it's more interesting to get more varied events, and since a +stability when you're already at +3 has zero game effect (unlike a -stability at -3), I'd prefer they didn't trigger then. It's true it's not a
necessary change, but it would be a very easy one.