There has been a flurry of reports in the news lately about the supposed damaging of olive trees by, you guessed it, settlers.
The police have not found any solid evidence, but this hasn't stopped the media from throwing around accusations.
JoeSettler has an excellent post on this called Bubblegum, bullets, and branches. He explains things better than I could. (Hint - they have videotape of the Arabs cutting down the branches themselves.)