Looking up the Zodiac Killer (as I only know the _very_ fuzzy details), I noticed something interesting on Google: "Do you manage the online presence for Zodiac Killer?". I can't imagine too many people are in a hurry to say yes to that!
If he is Ted Cruz then better to have people joking about it and not actually taking it seriously.
If he is not Ted Cruz then better to have people joking about Ted Cruz and not actually taking it seriously.
Sounds to me like his online manager is doing an excellent job after planting the memetic seeds in the public consciousness.