I would also add websites that implement User Agent sniffing and which arbitrarily block web browsers if they aren't on their list of "supported" browsers. Deeply frustrating when a site blocks you from accessing it and just tells you to "download Google Chrome". Especially when you spoof the Chrome User Agent and the site then proceeds to load just fine.

 :-$

Bad design is usually a team effort.

I remember the good old days when we disabled JS by default :(