I don't like the ban either... but I have been predicting it for years. A lot of these idiots make a point of going out and ripping around when it is wet out. They try to tear up the ditches. Most of the time, it is kids doing it, but not always. A couple of years ago, when they widened 71st Ave, the county was trying to get grass growing in the new ditches. Every time it would rain, there would be dipshits out on dirt bikes tearing up the ditches and the newly planted grass. They were even driving over the straw waddles that were placed in the ditch to help control erosion.
If it were kids doing it, the parents bear some responsibility. If it was wet out, they should have had the common sense to make their kids leave the dirt bikes parked in the garage.
Bottom line for anyone upset about this (Obi)... blame the idiots who pissed off the landowners and tore the hell out of the ditches. I am not happy about it either, because I have occasionally ridden in the ditches. However, I only did it when the conditions were dry, and no damage was being done. I totally understand why it was done, though.