You jest, but this is literally how some 4chan "culture" was conceived, how they take ground. They just kind of, passively associate otherwise innocuous things with their in group, such as, getting a bowl cut, wearing a hawaiian shirt, drinking milk, using the OK symbol. Having a shaved head, using image macros of a frog from a somewhat decent indie comic, stuff like that. Then, over time, people notice these symbols, begin to associate them with the group, and then the in-group can use the out-group's "ridiculous" reaction as internal propaganda, in order to make their opposition appear ridiculous, and appeal more to moderates who just see the surface level aesthetics of some people getting mad and some people goofing off with something innocuous. This is a legitimate political tactic that has been used and abused quite thoroughly. Generally, though, yes, you would want to use something more innocuous and stupid, rather than something blatantly disagreeable, like kicking puppies.