No... if you close your eyes and wish hard enough, the mobs may start attacking on their own... or you could try to call them names and see if you get any response
Think of it this way, if a mob has no command, or value to attack, do you think it will attack?
If it has a command and value to attack, do you think it will now attack?
You could have answered your own question by putting a number into the mobs attack values, and then loading up the game to see if you get hit.
And also, try the /attack off, /attack on toggles, just in case that is the reason your not being attacked.