Comment by wiz21

He forgets to mention intellectual properties issues. Working with a friend here is super dangerous if you don't define who owns what before starting. For those who are like I was sometimes ago, things can go super wrong : someone claiming copyright on some code you wrote (yes, he can do that even though he didn't write a single line of code; just because "he got the idea") can actually block you from using it for your own; that is your code is not yours anymore because you are afraid of your friend claiming (and winning) copyrights on it...