An interesting way of looking at the reasoning behind the ban on images of the profit.
Copied from Atheist Republic.
The image ban on Muhammad may on the surface appear to be a religious rule for Muslims. However, in reality, it is an attempt to control all people by generating fear of backlash.
Consider this scenario: Meet John and Sarah. John says to Sarah, "I have a deep respect for Dwayne and even the mention of his name by others offends me so much that I will kill people if they say it." Even if Sarah doesn't have personal affection for Dwayne, she will eventually start to respect his name - either out of fear or out of respect for John. Fear of John's reaction starts dictating Sarah's behavior, even though she doesn't share the same beliefs. John is able to use this as the thin edge of the wedge to gain other control over Sarah and everyone else around him. So next, John will state that Dwayne makes specific demands on him and he fears Dwayne's wrath so he has to do these things, and because he has to do these things, so does everyone else in the interest of harmony....and on and on it goes.