Of course, unsympathetic neighbors or apartment owners may limit your desire to express your team loyalty in this way. In which case, you might subtly do it in your garden. A bed of purple and gold Johnny jump-ups (miniature pansies) can hint that you're a Tiger fan. And this color scheme can pass if you're living in a community in which a rival team is located.
Perhaps they should change their loyalties to teams that have less jarring color combinations.
And never, never, never go in for team logos. While some are okay, the New England Patriots' helmet logo is absolutely the pits!