Overly Legal Software?

I recently bought a license for PaintShop Pro, as I really don’t have the patience to fight with the Gimp (sorry Donncha!)
I’m not a graphic artist, but being able to do some simple editing of images is handy for customising blog templates etc.,
This evening I wanted to change the header images on monetise.it, as I was still using the default ones. PaintShop Pro wouldn’t let me! As I had chosen to use images of bank notes it simply refused to edit them and directed me to RulesForUse. I wouldn’t have been bothered if it had simply warned me about potential issues, but blocking me completely is a bit nuts. (It also begs the question – what other types of images don’t they want you to edit? If I try editing a hardcore porn photo will I be sent to the Vatican’s official website?)
I ended up using the Gimp to do the resizing, but that’s hardly the point.
I’m amazed and a little annoyed.
I wasn’t trying to commit fraud and you’d have to be really dumb to possibly confuse the images in the blog header with real bank notes.