On not counting heads in church.

This may sound cheap, or trifling; perhaps it is. But here are four reasons for abandoning the almost universal habit of counting the number of people in worship services:
1. It is unnecessary. I guarantee you, any pastor who steps into a pulpit, week after week, for more than six months, can tell you within a margin of error of plus or minus ten, how many people are in the room.
2. It is distracting for the ushers doing the counting; it takes them out of the service for that time.
3. It is distracting for the people being counted.
4. It sends the wrong message to everyone involved. You, worshiper, are merely an unnamed part of a statistic after all; and, if the number is larger than it was a week ago, or a year ago, does that mean we are "successful"?
I pity the poor pastors who judge their own effectiveness by the headcount; and I feel for those who don't, but whose Boards do.
It would be handy to be able to build a biblical case against counting; the closest I can come is God allowing Satan to incite David to take a headcount in 1Chronicles 21. It is not clear what the nature of the evil is here, but if you assume a faithless reliance on numbers on David's part, then surely, in a culture as statistically driven as ours, we face the same danger. Comments???