This do not poach policy happens all over the globe and dammages a lot of potentially promising careers,say for instance a boss does not agree with you on a number of key issues and you make your reports at board meetings that contradicts his assesments on a particular issue, he definately sees a conflict of interest here. Instead of allowing you to ply your skills if an opportunity comes around he does his homework and tells your potential employers in the same industry,people he knows, that you are a bad egg and should not be considered for hiring in their company because you are a liability, when in truth and in fact things are the other way around.