In all, it doesn't look like vandalism to me.  It looks like some folks had a little party, got rather drunk, and probably stumbled into the twine and posts holding up the peas.  Would have been harder to explain how they broke the other sign, but if they had been out to massacre the garden, the damage would have been far worse.  We have pumpkins that are bigger than your head (bigger than my head, even, which is saying quite a bit with my ego), corn plants over eight feet high, and multiple rows of ripening tomatoes all inviting carnage - but all were untouched.

I think it's odd to choose a church property as the site of a late night party, but there are lots of trees and shadowy areas that provide a lot of privacy.  We're investigating some flood lights to make the area a little less enticing.  Overall, I hope that next time (if there is a next time) they're more careful - both about themselves and about the garden.  We're over 150 pounds of donated produce thus far, not counting stuff that our members have taken home with them.  It would be a shame to see that good put to an end through malice or carelessness!