I don't really like <marquee>, and believe it should be user configuration to just display static or to manually scroll it; the user should also control the blink rate for the <blink> command too (including zero if they do not want it to blink)

No joke I was visualizing a marquee scrolling by as I was typing those words.

My favorite stupid browser trick is nested marquee tags. It was quite easy to find awful edge cases last time I played with this.