The need for users to be aware of the options contained within web browsers enabling them to alter the appearance of web pages.
shunned in favor of POST, which all Web browsers actually contain support for.
Well, almost; PUT will have been shunned in favor of POST, which all Web browsers actually contain support for.
Don't worry; even though it is the most common way these days, web browsers are aware and often provide countermeasures against suspicious websites.
There are also pop-up ads, although with many web browsers and pop-up blockers, they'll never see the light of day.