First thing Brew, your first post shows exactly why you should stay out of MOAs.
The fact that you don't see the wrong in it, the fact that you think flying "only a 172" somehow degrades the danger, the fact that you think sophisticated avionics have anything to do with it, and your blind assumptions that any other pilot in the sky can see you show how little of the big picture you have. Next time take the 20 minutes to go around, you obviously could use the time.
Secondly, check the search function. It has been explained at great length in past threads why GA should stay out of MOAs.
HD