i saw the coupon code on the market today for the free 8x10 at walgreens, so i took advantage of it.
i have a book of 8x10s from various labs, showing the quality (or lack thereof) so as to make a point for why i don't sell the disk for cheap.
i sent the file via the internet and showed up at the appointed time to get it. it wasn't ready so he apologized and said he'd find me in the store when it was ready.
a few moments later he came up to me looking perplexed. he asked if i had permission from the photographer.

i very quietly looked at him and smiled...and then told him i WAS the photographer. pulled out my business card and drivers license...i had to fill out a form and leave my card stapled to the form...but he wasn't going to give me the print without proof!
i am impressed. it was clearly a professionally taken photo of a family that i had watermarked very largely across the center. he said just before me they had a customer send in 30 files from the internet, and halfway through the bunch were 3 pro photos...they tried to slip them in and were upset when the store wouldn't let them have the prints.
that said...the quality was awful

but that's to be expected. and that was the point i was trying to make

i'll add it to my book.