Awesome Music: Pick any famous song by them, and it'll probably get you really riled up just based on each song's intensity and badassery.
Cargo Ship: Tom Morello x Arm the Homeless, apparently. More people might have noticed if the music wasn't so badass. (Tom's "Arm the Homeless" guitar is the one he uses for the band's F#-minor songs, like "Bulls on Parade", "Guerrilla Radio", "Know Your Enemy" and "Bombtrack", among others.)
Covered Up: Not as big of an example as others, but some people think "How I Could Just Kill a Man" and "Renegades of Funk" are RATM songs, when they belong to Cypress Hill and Afrika Bambaataa & the Soulsonic Force respectively.
Crowning Moment of Awesome: A grassroots movement sought to take their song "Killing in the Name" to the Christmas number one spot in Britain, and, by extension, prevent the winner of The X Factor from getting it, which had been the case for the past four consecutive years. It succeeded, outselling the #2 by 50,000 sales with downloads alone. Made more awesome by the band donating their earnings from the sales to charity and celebrating their victory by announcing a free gig in the UK in 2010.
Their show in Santiago, Chile in 2010, which Tom Morello described as the craziest crowd he's ever seen for anyone, anywhere. Have a look at it.
Tim climbing onto the set piece of the 1999 VMAs after their video lost to Limp Bizkit's "Break Stuff" out of protest. Whether you think it was right or wrong, that's a pretty ballsy thing to do.
Face of the Band: Both Zack de la Rocha and Tom Morello. Many people probably won't have heard of Tim Commerford or Brad Wilk until looking at this page.
"Funny Aneurysm" Moment/Hilarious in Hindsight: A lot of the comments on the "Sleep Now in the Fire" video nowadays are about a Freeze-Frame Bonus about a minute into the video where a man can be seen holding up a sign that says "Donald J. Trump for President". Seventeen years later, Donald Trump is officially elected as the 45th President of the United States of America. Which trope this falls in depends on your view of him.
One-Scene Wonder: Zack was featured on a track by hardcore hip hop duo Run The Jewels, of all things. His verse was well-written and skillful enough to spawn debates about whether he wrote it himself or used a ghostwriter, though he has done other features before that have demonstrated that he is a gifted rapper. "Digging for Windows", his first single off his oft-delayed solo album (produced by El-P, no less) should hopefully lay all controversy to rest.