Here are ideologies from the Web 1.0 era which moron “webmasters” (I use this term sparingly) seem to still use. In most cases it just makes a website annoying and difficult to use.
1. “If there is automatically playing music and videos, it will get a users attention”
Unfortunately not. All this does is aggravating users who are startled by an unknown (and unwanted) audio source. This will obliviously lead to users closing your web browser just to stop the annoying voice. In a recent piece of research by Full On Design in regard to what people like and dislike about websites, one respondent said when asked about automatically playing sales pitches:
I hate it when some annoying sales crap comes up, as it interrupts my music or podcasts [...] normally I would instantly close the website which is to blame.
Anonymous Respondent