A UK school has banned the use of whistles by teachers in the playgroup as they sound too "aggressive."
Complaining about the rule, teacher at St Monica's Catholic Primary School in Milton Keynes, Buckinghamshire, Pamela Cunningham, wrote a letter to Country Life magazine.
"At the primary school where I have worked for more than 26 years, the blowing of the whistle to signal the end of playtime has now been banned," wrote Cunningham
"It's thought to be too aggressive and some children may be afraid of the noise."
Now, teachers have to raise their hands to get the children's attention.
"God forbid that we should have to gather the children in an emergency - I still keep my bone, hand-carved dog whistle in my pocket just in case," she writes.
Supporting Cunningham's stance on whistles, The Telegraph, London reports Professor Alan Smithers, of Buckingham University, "branded the move as 'crazy'."
"We have become extraordinarily over-sensitive. Does this mean children are not going to be able to play football and hockey because the referees use whistles?" said Smithers to the Sunday Times.
Psychological therapist, Emma Kenny, told The Sun, she didn't "know where the basis of their evidence has come from but if a child is taught the alarm system - there is no reason for it to be feared."
The whistle ban comes after a Melbourne school banned watermelon, bananas and strawberries from lunch boxes earlier this year.
More recently, a Geelong school was questioned over reports they were "banning" students from hugging.