Over the past few weeks I've made several VFR transports between Kansas City, Missouri and Shreveport, Louisiana, always on radar following so that I have a discreet squak and thereby show up on Flightaware. The route took me through the HOG High and HOG Low MOAs in Arkansas. Memphis Center controls these MOAs. On the first attempt through the controller stated, "The HOGs are hot," and without comment vectored me around them, adding considerable time/distance to the flight. On the return leg the same thing happened. On a subsequent trip the controller stated, "Be advised the HOGs are active." Hmmmm. I asked the controller if "active" and "hot" had the same meaning. He said they did. He also stated that I could fly through them if I wanted, but he could probably not provide radar advisories. The weather was CAVU so I went through. Today I spoke with a friend of mine who is with ATC and asked him about one controller vectoring me around the MOA, and another just advising me that it was active and advisories may not be available. He told me that due to the possible multiple targets in an active MOA a controller may not be able to keep up with advising me on each of them. He suggested that in the future if I wanted to proceed through an active/hot MOA and the controller was reluctant, request to terminate radar advisories and then pick them up again when exiting the MOA. The simple problem is, understandalby, the controller does not want the responsibility of providing radar advisories to a VFR flight that's flying through an active MOA. Class dismissed.