That's why I didn't stop at 't-shirt' and the other options I mentioned are approximately progressively more 'professional'. While I do understand your point,

That's why I didn't stop at 't-shirt' and the other options I mentioned are approximately progressively more 'professional'. While I do understand your point, I hope you understand that I was arguing in regards to the article's content and the position of that particular person, that of developer/programmer/etc. They were/are not a receptionist, a member of the executive board or even account manager, all of which let's assume could wear that without issue at work.