If you put one about every two inches in every bit of wood in your entire house, you'd be right
I've spotted the buggers from the thing-goes-through-wood (in my case it was the flailing limbs of a small child, not a mop), the dirt-and-spit they use to plug up any irritating nailholes or so forth that let light in, and doors getting 'sticky' because the tunnels behind the wood are pushing out and making the doorframe smaller. The professionals have a gizmo that 'listens' for munching noises.
Screw the tenants trashing the house, when I do my inspections I'm more interested in checking for termites. I have a barrier treatment but they still get under it, and it is cheaper to kill em when you see em than treat the entire house and STILL need to kill em when you see em.
They stick some dust stuff in the holes that apparently they carry back to the nest, drill a few holes around the damaged area and pump in liquid poison. They aren't just killing half a dozen visible termites.
Last time I had termites in it was about a week after the last warranty expired, so there went another $200 for a spot treatment. The only wood in this house is doorframes, window frames and 2 rooms that still have skirtings - they've never got as far as the roof, which is about 4.5m off the ground and the walls are dry as a dead dingo's donger (have to say that, the house in question is borderline outback ).
I had my worst termite damage adjacent to a badly leaking iron rainwater tank, and in a cupboard - with some delicious books in it - that got soaked in the 2007 floods, and before I had the house reroofed everywhere there was a leaking gutter there were eaten out skirtings, which is why I ended up removing most of the skirtings. They like moisture, and don't seem to do much damage each visit.
The house is 134 years old ... in an area that is so deforested it is no surprise the termites go for houses. I'm not all that fussed, its still a house and it only cost me $25k.