The plot of Dirac, at least in maple versions 15 or less, produces an empty plot. If not empty, then it is at least not what is expected and it is not useful for anything. I have no access to maple 16 or 17, just yet.
The lack of an error message is not proof that the plot is useful. A correct plot of a Dirac distribution is empty. A useful plot contains approximations to Dirac, something visible which shows the force applied, even though the interval is incorrect.
I tried to post sample code, but was prevented from doing so by the MaplePrimes web site. Perhaps when the issue is resolved, then I can post examples.
I have my doubts that this reply will work, because it did not 24 hours ago. If so, then wonderful, I am glad.
Best, Grant Gustafson