I sincerely doubt that someone is going to go to the trouble of PRT SCRN then pasting into a powerpoint presentation only to have to crop the image, adjust the res and then export as a JPEG.
More than likely they will leave your site and try and find it elsewhere.
Does that script disable the print screen button of visitors?
No. But studies have shown that very very very few users attempt to steal an image if right click|copy is disabled. Most just move on.
Does that script prevent a visitor from seeing your source code?
Who cares about source code? Source code is is the instruction on how a broswer should render the markup language. It won't help them reconstruct an image. It
may give them the filepath but unless they have FTP permissions then it won't help.
There aren't many ways to stop images being stolen, there's just one: don't put them online. It's a simple fact, it has nothing to do with right or wrong or blindly accepting it.
Again - that is just simply not true. You obviously just do not want to investigate the ways that limit image theft in which case you should be silent on the issue but you are making yourself look foolish.
It also makes me smile that those members who say
My photos are not OK to edit
are the ones advocating not putting your images on the web unless you accept theft is inevitable.
If you don't want your images edited then do not post them online. :lmao:
This comes down to attitude not morals.
If you believe that there is no way to prevent image theft then you are misguided. There are a multitude of ways and the real answer is that you are to lazy to investigate them.
But please don't pollute new photographers with your apathetic views upon the theft of peoples artwork. It's actually offensive.