I was in a Lyft talking about the bike shares and my driver said he had heard they were all getting destroyed in the east bay. All I could find was this article from August that talks about a few stations that had flat tires, and a bike that was found in a lake.
3 acts of vandalism that affected maybe 20 bikes tops seems small compared to the 7,000 bikes in the system. And yet it's interesting that this both got news coverage and was enough of an image to stick in my driver's (and my) head.
Also, check out this article about a Chinese bike share that lost 90% of its bikes. Wow!