Picture, if you will, the Mona Lisa painting, but with a massive McDonald's logo bottom right, then you will understand how disturbing and bothersome it might be.
In an ironic way, it's disrespectful to those members who've put in the work to remove the original RLC logo and artefacts, so that we can enjoy an untainted video clip or picture gif.
It's taking credit for other people's work (without direct thanks) and passing it off as their own - like putting a watermark on Jaws and telling Spielberg to "fuck off".