To copy something all you have to do is on your keyboard click the PrtScn Key  ( print Screen ) open photoshop, click file-new and then edit - paste and the screen is there in Photoshop and you can just crop out the bits you want.

For text in Internet Explorer all you have to do is go to View - Source and find what ever bits you want in thr HYML code.

So really no it isnt a great idea. As with everything if someone wants it they will find a way to get it.