Well they aren't insulators, they are typically conductive, and some time dissipative..
Boards plugged into anti-static foam tend not to function properly.
Place boards on paper or card board, and wear anti-static straps in handling the boards in high static, low humidity environments where static build up is likely.
ST usually has schematics under the "CAD Resources" tabs of the product pages if you want to trace the circuit and probe voltages.
Generally damage is more likely with metal surfaces, or shorts from metal pens and pencils, or wire, etc.
