I think it's pretty arrogant if a pharmacists demands the title out of pride and wanting to puff themselves up, but I think it's a title that's earned.
Seems like every other non-physician doctorate program commonly calls themselves "Dr. soandso" these days. Chiropractors, dentists, veterinarians, optometrists, naturopaths, and some physical therapists go by "doctor x" and even have such wording on the signs to where they practice, it's pretty common place for them to use the title. Heck, I've heard chiropractors labeling themselves as "Dr. X, chiropractic physician." I think pharmacists, who did more schooling than some of the other professions that use the title, who have rightfully earned the doctor of pharmacy degree should be allowed to use that designation. Not out of arrogance, but out of advancing the profession and being rightfully recognized for the study put into becoming a pharmacist. If everyone else can do it, why not PharmDs? If we want to go by real "original" terminology the only people who "rightfully" should be called doctor are the Ph.D. graduates.
Pharmacists have done a horrible job with marketing themselves. How many people don't realize that pharmacy is a grad school required degree, that we are experts in a healthcare field, or do more than count by 5s as so many people think pharmacy practice entails?