I took the strap off both my Pentax cameras, my old Sony F717, and most other cameras I've owned in the past decade. I do use a hand grip strap during long shoots (i.e. weddings) but otherwise, I go commando all the way
Although the strap affords a certain degree of safety for normal use, when I'm hustling during a shoot it always seemed to either get tangled in my external flash or somehow find its way around the front of the lens or in my way of focusing/zooming.
I'd rather Pentax nix the branded strap and include a Pentax logo jacket instead.