I don't know if it's fair to say that they are "randomly" flagging items - I'm guessing they're using a similar set of tools that they use to algorithmically determine if, say, Youtube videos violate their TOS.
Probably a recent update / bug increased the number of false positives more than expected.
Not that I'm sympathizing with Google - just seeing if there's a less click-baity reason for what's going on.