Personally, I don't feel strongly either way. I think that there are a lot of idiots that try to post crap on Youtube that they think is parkour, and there are a lot of people who only do parkour so that they can make videos and put them on youtube for the "glory", but I find some of them help me and a lot of new traceurs to learn and grow. There are pro's and con's for anything if you think about it.
And I have no idea what Poisonous Corn Epidemic is, lol, so yeah.