I would not recommend this approach until you feel every other option to deal with the situation non-confrontationally has been unsuccessful and the owner is a complete ####### who will not in any way try to cooperate, but I have had this issue before and I dealt with as follows:
Step 1: Make huge pan of bacon and eat said bacon, collect grease.
Step 2: Pour bacon grease liberally over the poop.
Step 3: Devil dog will now clean up his own poop off your lawn.
And yes, I know it's unfair to the dog, not his fault his owner is a meatstick, but after fighting a losing battle for quite a while, I just needed to see the dog lick his face once to feel like it was all worth it.....