But you might remember the disaster as HN as an experiment tried to get rid of those by banning all politics topics... Of course not 100% identical, but some analogues hold. Going against flamewars is quite different than banning topics wholesale - and if you are a "quiet voice", are you going to dare touch anything potentially political now?

And if it's about professionalism, you probably shouldn't communicate your policy change to your employees through the personal blog of an executive...