No need, Look at what was designed by the industry, In use now & in history, NACA/NASA documents of just that idea. (Pop Emigh) Had a design that would "self destruct" when the rotor tip path would dip below the C/L of the gimble/teter bolts.
When the center of lift or unloaded system would flap and move beyond the center of mast rotation you would get an unballance that would rip out the TXSN structure. Pylon whirl is dampened by good design, hit the books.