Yes , unfortunately a lot of people like to tell others how they should live their life even when it isn ' t hurting anyone else . Sometimes enough people agree that we make laws against such things . Is someone else ' s freedom to do sinful things so disgusting to you that you need to ban it ? Why do you hate freedom ? I realize ThatZenoGoddess isn ' t taking a position here , I ' m addressing those who would ban things because they see them as immoral . <| sep |> I think the guy you replied to is joking . The zeta function is perhaps one of our best examples of an object actually existing out there . <| sep |> I ' ve no doubt simple trade on most physical goods will not prove to be a problem . Well they ' ll be subject to tariffs as per WTO rules . But the actual level of the tariffs aren ' t that high for most stuff with the EU average for non agricultural tariffs are just over 2 %, but each thing is different ie cars are over 10 %. Financial services may get a pass due to pressure from multinationals and the current setup of London as the main finance hub being too important to crush in one blow but we ' d see bits of it leave the UK ifwhen the EU deregulates or lowers tax . Not a chance . One of the EU ' s longest running bugbears with the UK has been the City Of London meaning that the UK has blocked any financial regulatory powers . No danger are they going to maintain access for it .