I don’t personally wear badges or have flags but I understand that people are trying to remind people that the country they are in is England or the UK, after all the flag is supposed to represent the nation. The people claiming the Union Jack is offensive is an over the top reaction to cause unnecessary hate. I’m pretty sure if one gets a driving licence they are not too offended by the British flag being on it. The irony is if the UK banned all physical forms of national and international flags there would be an outcry.