Yeah, this is an area of debate for some. Others say:
"Electrostatic hum and buzz entering a system from your instrument can be totally eliminated by 100% shielding of the pickups and control cavities. Usually, somewhat less than 100% will do an adequate job in guitars, which are inherently hard to shield; but the more complete the job, the better the results. The whole idea behind shielding is to completely surround all circuit "hot" leads with a low resistance conductive cage which intercepts electrostatic fields and grounds them out.
I made my choice, others can choose for themselves.
Nevertheless, thanks for the tip; if I had an over shielded or incorrectly shielded Strat I would be concerned.