When someone walks too slowly in front of you, they are annoying, not "offensive". You are perfectly with in your rights to be _annoyed_ at them -- but you are _not_ "offended". In order to be offend-ED, some would have to actually _offend_ you, not just annoy you.

Similarly, in this context, I'd disagree: No, saying "dongle" in earshot of someone who tweets about "enhancing" the contents of one's shorts by stuffing socks down them does not give the over-hearer any "right" to be offend-ED, since it obviously isn't anything that this worthy regards as particularly offens-IVE. She obviously claimed the right to _maintain_ that she was offended, but by any sensible definition of the word she actually wasn't.

[Edit:] Duh, that's what I get for replying in a browser tab I opened ages ago -- I see someone said most of that already.