Diver Dennis
Contributor
The restriction for the larger jets just mean that it will cost more (typically $30-$50, each way) if you bring an extra or over weight bag. That may not be much in the context of the overall cost for the vacation. Although nice to avoid if you can. But really the airlines are just looking for an other revenue source. Smaller aircraft like inter-island puddle jumpers may have more restrictive weight limits.
Good point, I just pay a little extra to bring all the stuff I might want. I'd rather have my stuff than worry about a relatively insignificant charge.