Ramsey or Kiyosaki doesn't matter! Getting rid of "bad" debt is important!
I strongly believe whether or not you use debt or don't use debt to buy real estate, it is important to pay off debt that is not related to your RE investments. All of that interest your paying is money that could be used to invest in RE. It also, as @Brie Schmit points out in another thread, can decrease the amount you can borrow for RE purposes.
I don't care what you call it, "bad" debt is not good for you or your RE investing. Pay off those Credit cards, your medical bills, that flashy new car, or whatever else you have that is dragging you down. Build up reserves!
Yes, of course at some point if you are fairly wealthy it may make sense to finance a fun or family car, particularly if you can make more money investing than what you're paying in interest rates for your car loan.