"Don't try and confuse the facts with half-truths and gorilla dust." 
That line from NewsRadio always cracked me up.
But you’re right, perhaps there could be a disclaimer below it, or this following line (from that same wiki entry) could be given more prominence. 
Alternatively (v9.0+), you can get the image to search from the System Clipboard, Trigger Clipboard, a Named Clipboard, a file, or from an image elsewhere on the screen.