A famous author (E.E Cummings) had the exact same problem with his writing. At the end of one essay, E.E. Cummings simply included a long line of commas, periods, semi colons and full colons to appease an editor. You may want to consider, as a signature, including all of the punctuations available with a friendly note to any disgruntled reader that they can stick these anywhere they like.
http://www.poetryfoundation.org/bio/e-e-Cummings