Short answer: no, it isn't improper. Longer answer: it's case by case, depending on the relationships of the individuals involved. Formally, you don't owe yo

Short answer: no, it isn't improper. Longer answer: it's case by case, depending on the relationships of the individuals involved. Formally, you don't owe your ex-employer anything, and unless you've explicitly signed an agreement that you're breaking, there are no worries. Of course, it's probably more complicated than that, so use the old put-yourself-in-the-other's-shoes principle. Do you feel like the way you're approaching it is wrong? As you've explained it, the guy quit and your ex-boss is childish. You're all grownups and are free to make decisions. No point putting yourself out to protect someone who likely doesn't care about you or your business.