Stuff gets posted here constantly without any sort of credit.
True, but people still deserve it, even if people don’t do it.
I dare you to track down the source of each and every pic someone posts and give the original creators credit.
Not sure why you made this point. It is ideal for us to cite sources when we can. The fact that one person can’t find sources for every image in a thread of hundreds of pages isn’t a counter argument to that.