Aileron flutter can progress to flutter of the wing, depending on the stiffness (mostly torsional) of the wing and control surfaces and mechanical interplay between the wing and offending aileron. It can actually happen the other way around, with the wing driving flutter of the control surface.

This kind of interplay is what is suspected to have caused the wing to fail in the Gee Bee crash from the early 1930's that was captured on film and has probably been seen by most of us. Keep in mind, however, that a WING can actually flutter independently of the control surface. It is rare, but can and does happen occasionally. I have had it happen wilth glider wings with high aspect ratios and relatively inadequate torsional stiffness. You can make a yard stick (wooden only) do this by whipping it like a sword in your hand. Try it! You will also hear the sound of flutter, which of course has come to be known as the death rattle of any airplane that is experiencing it.

Any wing or aileron (or other control surface for that matter) can flutter under the right conditions. Mass balance and proper stiffness are employed on full size aircraft and by modelers if they are smart. The stiffness and balance serve to keep the flutter "envelope" outside of the operational envelope (mostly speed, but load and other factors to a smaller extent) of the airplane.

Keep in mind that on a typical light aircraft the control systems are "free floating." They are tied to movable controls. Our models controls are tied to servos that are not easily moved by aerodynamic inputs from the control surfaces. When connected by properly stiff control rods and cables, this arrangement tends to prevent (damp) the onset of flutter in MOST (NOT ALL) cases. This is why we typically get by with improperly hinged, improperly balanced, and improperly aligned control surfaces without disaster.

Regards
littlera (aerospace engineer)