Like Indy said, for $2-$4 a plug why worry about it? If getting a longer life, like Years out of your plugs by bead blasting or whatever, , , that may not be a good idea.
I read a thing a while back on spark plugs. Briefly it stated that there is a heating and cooling cycle on a sparke plug. Over time, especially on a 2-cycle engines being that they fire every 2 strokes this takes a toll on the plug and makes it less "efficiant". The other thing that makes a plug less "efficiant" is when the electrode (the thing in the middle of the plug not the thing you bend to adjust gap) wears and becomes round, , the plug doesn't fire as well. You can't correct that.
If your fouling plugs regularly I'd say your either using some bad oil, mixing oil too heavily, Oil pump is set incorrectly, using the incorrect heat rang spark plug, or some other issue.