I don't really think it makes sense for this to happen. The premise of SPV mining and the security of which would assumed to be similar. It doesn't make sense for anyone to do so, simply because it is so expensive and serve little to no purpose other than a few minutes of wasted work, which is far less than the money you spent because most people don't generate a block every 10 minutes. You cannot possibly manage to trick and mislead the pool for long enough, and if you do then the costs of which is far too much (>$190K per block). It is the same principle as an attack on an SPV client, unless your opponent is a small time miner that takes virtually no precautions, then the chances of success is not high at all. Any reasonable miner would be as well connected as possible with multiple redundancies.

Just to reiterate, I don't think anyone is purely SPV mining without any validation but this attack would be as pointless as a 51% attack on the network.