The idea that using a laser pointer should be punishable at all is ridiculous, let along that the punishment should be jail time. I may not be familiar with the serious risks of laser pointers, but their use is so widespread that I can't imagine their use is such a danger to society.
No, jail time is not a suitable punishment for laser pointer use, even in areas in which it is banned. At worst, laser pointer use is an annoyance and not a hazard to public health. Therefore, a fine would be a better punishment and jail time is a quite stupid punishment.