If you bought it at the discounted 2yr price, it's required. You've signed a 2yr contract. If you don't want to pay the $10/month you would want to purchase at full retail cost, without contract.
Did they not tell you about the $10 a month when they sold you the tablet at a discounted price? I got mine free but was clearly told it would cost $10 a month on the plan which was fine as I wanted a tablet with data. If you wanted a tablet with wifi only you could have gone any where and gotten one at full price ir on sale and it didn't have to be hooked to your Verizon account. After 2yrs just drop it from the plan. Mary