I just had a termite company come to a home that I am in contract to buy in the Los Angeles area. It was one of those free inspections they give with the hope that you hire them to get rid of termites. They found termite droppings in the attic. I know nothing about termites or the damage they can cause. They didn't say much, only that "... there are a couple of areas that needed to be treated. With the possibility that the home needed tenting. There is no damage outside. They can treat the wood members by injection in the attic and above the garage." 1.) How can the inspector know if there are or if there are not termites in the walls eating the wood behind the drywall? They did not say anything about that and I know they didn't drill into the walls somehow to check. 2.) Would you ever use/rely on one of these free inspections before you close on a house? 3.) When there is damage, is it real obvious? Thanks.