I'm also absolutely guilty of sharing something über bullish add the WO with a link provided, but I just don't do it else wear.... (sometimes its just important to know where and when as well....)
The WO thread is a world unto it's own with its own special rules, though, and I don't think that's unreasonable. There are no signatures in WO, so no one can be accused of doing it for financial gain.
What's next? Banning people for memes?
No, but there is a difference between using a random picture or meme like in your example, and posting someone else's infographic without a source. Something like this (
https://thumbnails-visually.netdna-ssl.com/bitcoin-infographic_5029189c9cbaf_w1500.jpg) contains far more information and took far longer to produce than most of the content which is plagiarized around here. I'd argue trying to pass off something like this as your own is a far greater offense than the usual "Great project can't wait for it to go to the moon" plagiarism, and the latter does result in a ban.