One of my work colleagues once got a load of mouse mats made up, with a caricature of the Man Utd badge on them, with a rather unflattering logo. He was quite proud of the legal letter he got from United (Maurice Watkins, if I remember correctly), telling him to get them destroyed or he will be...
Last week I was choosing a design for some leaded windows in my conservatory and thought about having the club badge, or at least the Seagull - I decided against it, but I wonder if I could have been used for breach of copyright ?