In the 1980s, k.d. lang emerged as the e.e. cummings of cowpunk. In the 1990s, OutKast had that capital “K” while Eminem and Korn occasionally reversed certain letters in their monikers for kicks.

Finally, there are the purists, lowercase zealots and dedicated fontanistas who take pride in making big statements with little letters. Not only do they adopt the lowercase look, they are ...