This is bad. To run your own local DNS server is a part of good parenting. So, to break local services is very bad for us responsible parents, to say the least. I block all outbound DNS lookup except to my ISP. Sometime I redirect lookups to other resolvers (eg. 8.8.8.8) to my local DNS server. I don’t care if some app breaks because of this. Often it’s because of bad programming. So, don’t break local DNS!