So how many people have to dislike the noisy rider? 2? 5? You're assuming that because it doesn't belong to one person, that it's okay to act however you want in it.
This is why park restrooms are what they are.
You're comparing text to noise. Text is less invasive as it requires you to actually READ IT in order
for you to be offended. In theory text is a passive aggressive form of noise, it's not like listening to
Hanson or watching a Twilight movie, it's more like reading the Twilight novels, which aren't actively
offensive because as I said... they're text! It's much easier to ignore stuff that's in text form. My point
is that it's an unfair comparison.
Please, if I am being unreasonable, let me know.