Kids on planes.
I travel frequently, let’s say at least 2 flights per month. I have had my fair share of interesting flights. I have also had children and babies seated on either side of me. Once a kid even fell asleep on my lap. I have no problem with this.
What I do have an issue with is rowdy unruly children and parents who do nothing to stop them from annoying every other person on the plane for the remainder of the flight. I am not a parent but I do know this. Your kid is annoying. If your child does not suffer from a disability, mental or physical, control your little human and do not let them kick seats.
If your child has some affliction and kicking soothes him or helps him reach the other end without losing it, please be a decent human and apologise for this.
If you don’t, I might just go all Kindergarden Cop on your kid.