Copyrights, patents and design patents, like locks on your front door, simply keep the honest folks honest. Posting a picture on the internet with "copyright" on it is the same as putting those signs in your front yard "security system" so the theives at least know they have be real quiet.
A patent can be $5,000, an enfringement case in court can be upwards of $250,000 by the time it's done.
I have a patent (pending) on my ss bottle stoppers, one of the owners of a very big supply company asked about selling them, I said I couldn't, I said "I have a patent so don't even think about doing a knock-off", to which he responded "Patents don't mean a thing". ah, I feel a lot better.