It's so, so easy to do. I know I've done it. I think everything has. Not doing it requires a fair bit of being used to tumblr and being aware, and we all have moments where that's not happening. Definitely don't mean it as a judgment, just as a thing that's worth being aware of. And even among people who are aware of it, some choose to keep doing it, so ¯\_(ツ)_/¯

Very glad they're useful, and excited for you to get your tumblr going!