Yes I have, and I would like to think as I've gotten older I'd like to say I've grown up a bit. To be honest, I think the whole racism thing has gotten a little out of proportion. I only really consider something racist these days if its done out of hatred AND ignorance to a people of a certain race, sexual orientation, sex, or religion. Most of the time when I hear stuff online, I feel more like its just ignorance and not so much hate, and I've never heard someone use racist terms against someone for being a certain way. Usually its just stupid kids or people trying to be funny. Now if you want to use words like rude or ignorant, I think they fit much better.
That's just the way I see it. When I was younger I would on occasion use the n-word similarly to how a six-year-old might use the f-word. I didn't do it out of hate, it was more like rebelling. I would justify it by saying how rappers use it all the time. However I figured that its a bad thing period and it shouldn't be said at all so I've been trying (successfully) to not let it slip out anymore. I believe its a rude and hurtful term that should not be used by anyone with the possible excuse of history. ("Many hateful terms were made up including ______." for example. I have no problem with it in that context.)