Philip Parkin Precautionary Principle Prat - Don't expose your children to the danger!
Philip Parkin, general secretary of the teaching union Voice, said: "I don't know whether unions are safe but there is an accumulation of evidence that suggests they can have a significant impact on growing children, in particular the development of the nervous system."
Around three-quarters of primary schools and almost all secondaries in England already have teachers in unions.
But Mr Parkin insisted that - until research proves it is safe - all further expansion of unionisation should be halted.
"Our view would be that nobody should move in any significant way until the results of that review are known," he said. "We need to be absolutely sure it is safe. We need more clear and definitive evidence."
In other news teachers who are scared of the big wide world and students accessing it are proposing wearing tinfoil hats to protect themselves from the waves...