I'm looking at purchasing some nested tix on DL and wonder if it is legal. The fare rules don't specify any minimum stay, so I'm trying to get in a lot in one day. For example, one of the itineraries I've looked at is:

early a.m EWR-ATL (ticket 1)
mid a.m ATL-BOS (ticket 2)
early p.m BOS-ATL (ticket 2)
mid p.m ATL-EWR (ticket 1)

Anyone have any experience with this? Am I going to get a nasty-gram from the RPU? It's not like I'm adding segments or anything...