I'm not sure some of these reactions aren't a bit overblown:
The subject is a delicate one, and could have been handled/delivered more delicately, for sure.
But its not as if he was describing how self-abuse is done, or giving graphic details, or placing people into proximate occasions of sin, etc.
Ladislaus's point about some in the audience now having to explain to their 7 yr-old daughters what "m" is seems legit; others who observed the subject matter (if it was going to be delivered to a general audience from the pulpit), should have been done in such a way as to remain over the heads of the young, also seems legit.
But observing Fr. Pfeiffer's cantankerous nature, and turning it back around on him to imply he too must be suffering from the cause of violence, according to the premise of his sermon, was way over the top (and a sin). That kind of humor is not Catholic.
Even the points about the coffee and traffic cut-offs are not so out of place as some suggest: The point was not that SA causes you to snap from cold coffee or getting cut-off, but that an habitual practice of SA (or homosexuality) makes one a violent person (and therefore more habitually prone to continued acts of violence, such as the two examples he gave).
Dr. David Allen White once gave a conference at the seminary in Winona in which he observed that Dante (who was no madman) placed both the usurers and the homosexuals in the circle of the violent (i.e., Homosexuality was a violent act). The reason was because the usurer does violence against nature by making that which should be barren (i.e., money) fruitful, whereas the homosexual does violence against nature by making that which is fruitful barren [as does SA].
I believe Fr. Pfeiffer was trying to make a similar argument, though again, the delivery left something to be desired.
At the end of the day, yes, I would have come away angry had my children been exposed to the delivery of that sermon.
But the theory in itself (i.e., people who are mired in sins of violence become violent people, just as people consistently practicing any particular virtue become virtuous in that regard) is not so far out as some make it.
Don't confuse the message for the delivery.
And this is coming from me, mind you!