I posted the following bid request on Rent-A-Coder
PHP Directory Server 2
At the end of the bid I wrote
“To show that you read the requirements, write ‘I read the requirements’ in your bid. Bids that do not have this will not be considered as valid bids.”
I got 8 bids in the next 12 hours. Of those 8, 6 did not write “I read the requirements” Not surprisingly, of those that did not read the requirements, 5 were in 3rd world counties (the people you should never hire).