Well, you certainly won't get any complaints from me, QGL!!!
Now the mods may see it differently though! If they do, I would think a slap on the wrist would be your punishment, and personally I'd say it's sure worth it!
We could actually have a lot of fun using similar backgrounds for our knife shots, although, the abundance of willing backgrounds could be a problem, not all of us know such lovely backgrounds!
On a different note, I'd not seen that style of blade previously, as-a-matter-of-fact, I don't even know what you'd call it, guthook perhaps, but then yesterday I received an inexpensive Fury folder with the same blade, and then you show it again in your post!
When it rains it pours!