Around here, EVERYONE seems to have a wooden "privacy fence" around their back yard. These things are made of the cheapest wood known to man, are "stained" one time (when they are installed) and then they just sit there, rotting. The bottom of the fence is almost always in contact with the ground and tends to have tall, wet grass and weeds growing around it. Sometimes, I see where dogs have chewed and broken huge sections in order to escape and the homeowner has patched various areas back together however they could (chicken wire, cinder blocks, new wood, etc). Now, what I am noticing is that if I am not supremely careful, I can rip chunks out of the fence with the string trimmer. I'm not talking about sitting there at full throttle going after one stubborn blade of grass for 20 seconds, I'm talking about making a quick pass at about 1/4 throttle and barely contacting the fence. It tends to be a warped board every so many feet, that sticks out enough for the trimmer to clip the edge. Have you experienced the same? Lovely.