I saw that post too Tokio. I understand his reasonings. I live in SoCal and have seen first hand how a good report could kill a spot. I know, if it's such a secret spot why post it. To each his own. I too have done it before (long long ago) but I don't do that anymore. Instead I do what's in the pic below.
This way it doesn't have a dull/boring background. The blackout background kills the pic. With distorts; the pic still have it's natural colors, it doesn't kill the pic, the pic still look okay, and still hide the background. This is only done when I'm fishing on shore. When I fish on a boat, than distortion is not necessary.
Here's the original. If you surf fish in SoCal, you'll most likely know that the oil island (in the background) is in Long Beach. Upon inspection, you'll know that the oil island is not that far out from the surf. There is only one oil island that's not too far off the surf.
Sometime you don't think before taking the pix and just want to get a few pix so you could get the fish back in the water asap. You don't think about camera angles to hide the background until you get home and look at the pix.
PS. That pic was taken last year in spring, 38" halibut ~20lbs on a live smelt in ~4' of water on 8lb Trilene Big Game......