Yep, and sadly similar stories have played out all over California. A lot of people seem to forget that prop 215 only shields you from prosecution at the state level. Local LEO can still rip up your plants, destroy your crop, and cause you all sorts of head-aches and problems for legal growers, even if they do not ever get charged. It has been a common tactic for local LEO here in Mendo to drop in, destroy a garden, and then just leave. I think a lot of time they know full well that the chances of them getting charges to stick is slim (especially in Mendo), so they don't bother with arrests or prosecution - they just try to make life miserable for the grower.
Our last DA was pretty notorious for that - she was supposed to be "tough on illegal marijuana" when she got elected. Well turns out she preferred to go after small legal medical gardens mostly, rather than the big illegal grows in the state forests. That first year she was in office arrested something like 700 people, including trimmers and workers, mostly from legal gardens. It was all a bunch of bullshit of course, so only like 2% of the people ever got charged, and the county ended up wasting something like $11 million dollars on cases that never went to trial. Regardless, it still created a lot of problems for some of the the legal local growers who got "busted", since they lost their crops and hand to spend a bunch of money on lawyers and what not. Luckily the bitch got voted out last election - even all the anti-marijuana people were pissed at here because she wasted so much time and money and had nothing to show for it.
Until the Feds change their stance on medical marijuana there will always be a lot of risk, even for a legal medical grower. IMO, one should still treat their medical grow more or less as an illegal operation, don't be blatant about what you do, and make sure your ass is covered, even if you are in compliance with the medical guidelines.