It's no good drilling out or microwaving or otherwise destroying electronic components on credit cards. The card issuers have already cottoned on to this practice.
Last year, my local supermarket introduced PINless chip-based payments in addition to the old magnetic swipe. My card, issued by my bank, had both magnetic stripe and chip. Since I didn't like the idea of payments being able to be taken from my card without a PIN or other authentication, I fried the chip.
Then I found that the smartcard terminals wouldn't accept the card from a magnetic swipe. Apparently my card was "pipped" or "tagged" as having a chip, and the terminal wouldn't accept the magnetic swipe since it preferred to use the chip. Result: I had to explain to my bank that the card had been damaged, and wait for two weeks while they sent me a new card.
So you simply don't have the choice. If your card comes with a chip, and the terminal is equipped to read a chip, that's what you WILL use, like it or lump it. Obviously the magnetic swipe is only there for legacy terminals without chip capability.
So now I just use cash when I go shopping.