Do you really not see how abhorrent it is to be inconsiderate of other people? It may not be passive-aggressive but it's certainly rude.
In all seriousness, I think having a wank at work is a bit more off-putting than putting your feet up. I definitely can see how you'd think this was nasty, being totally anal about other, similar things, but what can I say? I'm just not thinking too hard about how whether I'm pissing someone off. Don't do it in a meeting with someone you're really trying to impress.
Sure, there are things you like to do that shouldn't be done at work, but the two are not correlated--or at least not as correlated as you suggest. While you've found some very amusing examples, they're tangentially relevant at best and used more for hyperbole, just like most of the article.