Please avoid using the term “Photoshop” as a verb, meaning any kind of photo manipulation or image editing in general. Photoshop is just the name of one particular proprietary image editing program, and there are plenty of free alternatives, such as GIMP.
If we called it "gimpshop" or "gimping" or something, I'm sure they wouldn't mind. It's a double-standard but I can see the point, why should you associate image manipulation with closed-source software?