It's a good point! I get mildly frustrated when I see copies of my wording, true frustration when I see poor spelling or poor rewording of my wording, but I'm most embarassed when I discover that I've inadvertently done the same thing to someone else - especially if their is actually better but mine made the front page! :P
That sucks. The most disappointing for me is when I do a caption and I see someone else do the same caption a few days later. Not a huge deal, but it kind of sucks when people steal your ideas. I haven't really tried to make a meme yet. I do a lot of crying dawson and yappy chihuahua, but that's just because I like my pics to be slightly different then what everyone else sees all of the time.