Black Friday

I never understood Black Friday, and now that stores have started the Cyber Monday trend it seems even more unnecessary. Why risk getting trampled in a mall or a large store when you could casually order anything your heart desires at home on your couch? With Cyber Monday customers are getting the same deals online, why hasn't Black Friday become obsolete? Also why has the government allowed Black Friday to continue when it gets so much bad press and causes so much criminal activity? The only people who profit from it are customers and the press, and most of the time customers get trampled in the process. I don't understand how this is still a holiday.