I am guilty of it, especially in my younger years. I had 4 credit cards by the time I was 21 and got overwhelmed. I ended up using one card to pay for another because I couldn't afford to pay the minimum of that one for the month. I actually did this several times and it can be helpful but you have to make sure you don't do this with all your credit debts or you will end up with a big mess!
I think most people have done this at least once. I know I have. I probably did it around 10 times in total because I had no other option at the time. This was when I lost my job and was struggling to find a new one.