Seriously? You do something like that in a public place and you don't expect somebody to talk about it? Tell their friends? Spit in your food next time? Not to mention, this is the 21st century--you can't say, do or write anything anymore without somebody putting it on the internet.
To say it violated the pastor's privacy is a red herring. A sales receipt isn't a social security number or a bank statement--how many hands and eyes go over a receipt from the time it's printed to the time it gets filed away in the records? Furthermore, I can only assume that the receipt was the "merchant's copy" and not the "customer's copy", so I don't really think the pastor had any rights to privacy over what she submitted to the restaurant for its records.
I'm not saying we should post everybody receipts online--though it would be an interesting study into how poorly people treat and tip service staff in this country--I'm just saying there are a few things about this particular case that push the limits of common decency.
On a final note, I am surprised the pastor didn't get fired. If pastors have the cash to be going out to dinner and then having the gall to write something so condescending and nasty to the person who did nothing but wait on them and try to give them a pleasant evening out, they have no right calling themselves pastors or even Christians.
It goes back to generosity, something I thought was a basic tenet of Christian teachings--something you can't really be lacking if you're going to get ordained as a pastor/minister/priest, etc. This woman who posted the receipt is a waitress, not an investment banker. She gets treated like crap by a dozen different people every day--all I'm saying is you'd think a pastor would have the decency to treat her with a little more kindness and graciousness rather than resorting to derision and hubris over a standard industry practice.
I care not for a man's religion whose dog and cat are not the better for it.