I've never heard of Dave, so I guess I'm free from that particular sickness. But a close look at my profile and its photo might indicate that I instead am afflicted by Atemporal Fad Disorder:
The desire to participate in an internet fad is considered by psychologists to be a natural, if sometimes unfortunate, aspect of human nature. Some individuals, however, appear to have a clinical inability to recognize the fleeting nature of fads, and continue to attempt to participate after everyone else is sick to death of the whole thing. The current diagnostic criterion is "the use of the phrase 'all your base are belong to us' in any non-ironic context" but in 2010 it is expected to be expanded to include any suggestion that a photo depicts a cat interacting with an invisible object.Do I need a Doctor? What's your diagnosis?