You can not use other group trademarks without permission . It ' s for royalty and licensing fees . Although if they didn ' t use their logos or trademarks , that ' s fine . Although you can ' t also use their likings either . <| sep |> To avoid this turning into a circlejerk though , I can understand the deep rotted feelings of belonging and doing things for a reason . Imagine if for hundreds of years everyone you know loved to eat bread , making bread and eating it would be like affirming your love and appreciation for where you live , since it produces wheat , which needs farming , which means jobs and a reason for being . Every year you and your people gather around and makeeatshare bread and recipes . Then some people come along and say ' Hey , bread isn ' t all that nutritious , it ' s dumb and a waste of time , you should be farming corn . ' They ' ve just shat all over your beliefs because they think their way is better . I can imagine if you have emotion vested in , in this case , bread , you ' re likely to react in such a way to protect your way of life . Simple as my scenario may be .