Interesting to hear from both sides of the airspace users in this thread. We rarely get to hear what the situation is like from the fighter side. I am surrounded by MOA airspace in Arizona and I commute to California for work in the RV. So, I and many like me, have been transiting MOA's for over forty years.
Two observations.... as mentioned, I have been dropped from flight following while entering a hot MOA at times. The controller does not seem interested in being part of the chain of liability. Can't say I blame them. When they call normal traffic 12 o'clock three miles opposite direction, it is probably on a steady course. A "dynamic" fighter is so unpredictable... that the controller would be almost unable to help. BTW, I have never heard a controller mention the stuff on his scope maneuvering "dynamically". I suspect the term resides mostly in the fighter pilot community. The controllers do refer to RV's and others as FLIBS. I will let you look that one up since this is a family site.
I like to think of myself as a cautious pilot, but can't see any way I could get any use out of my plane by going around every active MOA. I already put many miles on circling the Restricted areas in California. And they are hot almost permanently in recent years. I do find some comfort in the fact that the F-18 or F-16 driver is probably the most highly "tuned" aviator on the planet and in command of the most sophisticated flying machine ever dreamed up. If my little RV ever appeared suddenly in his windscreen, a slight flick of the wrist and he (or she) would whistle past me... and I would have a hangar story to tell. I can't remember any reports of a midair where I travel. And there are many thousands of VFR transits through the active military airspace. I give the most credit for this safety record to the fighter pilots themselves. And I am proud this Memorial day to remember those who came before.