I was on an MUP that connects to the one WoodWay was riding; I passed a guy in a full spandex race kit. A few minutes later, I was about to turn left off the trail, did a shoulder check, and saw the guy sucking on my wheel. I signaled and turned.
It does feel just a little creepy to have a stranger that close, and can be startling. On the other hand, on the same trail, I was heading up to a swimming beach, when another rider passed me, and slowed down as soon as he got in front. I had to make a right turn, and wasn't sure exactly where, so I didn't want to pass and then possibly right-hook him. So I stayed about two yards behind the guy, and two feet to the side. The guy seemed annoyed and motioned for me to pass, but my turn came about half a minute later, and that was that. I'm pretty sure that doesn't count as having drafted the guy, since I wouldn't have hit him if he'd stopped immediately. But he seemed to disagree.