I do not disagree, however given that he asked because he was looking at 72mhz beginner's radios ....

One of the two occurances I saw did result in a crash, and the offender was singled out by everyone else rather quickly. It was "suggested" that he make amends to the person who's frequency he stepped on. They remain friends.

2.4mHz is great in it helps to reduce the problem, but it should not be used to overcome poor practices or inattention.