SFist was there:
[I]f the scene we observed Tuesday evening was any indication, even the mothers with small children who frequent the park solely for wholesome jungle-gym purposes share something in common with the rowdy PBR-swilling, fixie-stacking folks to the north, who are fond of anarchist graffiti. They totally cut a hole in the fence within like 24 hours (not visible, at right), and then just went ahead and mowed down a section of the fence so they could get back in!
The question is, when they fence off hipster hill to fix the drainage later in the year, will us rowdy PBR-swilling, fixie-stacking folks trample the fence in order to sit in mucky grass like we usually do? Read on.