"If you don't listen .... we will lock you in the bathroom / dark room / terrace " etc ... And for added benefit - the threat is carried out sometime too .. so the child knows exactly what that fear is ....
Cut the scene - a few years later - the parents saying "I have no idea why he/she is afraid of the dark - he/she is old enough now to switch on the light in a dark room by himself/herself".
- Don't go into the water you will drown ; Later -- I don't understand why he/she is afraid to go to swimming lessons and keeps screaming ?
- Don't run/jump/climb etc you will get hurt; Later -- Look at that kid ... he/she is so good at sports and you ....
- Don't eat that - it is not the season for it ... ; Later - my child is fussy about food ....
- Don't make a mess or keep quiet - I am working and switching on the cartoon channel .... ; Later -- all he/she does is watch TV whole day ...
Admittedly parenting is a tough job [ especially if you think it to death :))) !!! ] We don't have the energy to keep up with kids and trying to maintain discipline when the child is on the tantrum train is a nightmare ....... yet ... some effort at viewing ourselves from the outlook of a child is required I think.