Is it taboo to bury a neighbor's sewer pipe under his own house?

The problem is not big. In ancient times, this situation referred to sewers. In ancient times, this was an obvious sewer drainage. Moreover, the floor is covered with dirt, and the polluted substances will seep up from the soil, so it will have an impact on the body. Now there are all drainage pipes, and the ground is covered with cement and some other things. There is no such thing as a sewer, so the possibility of impact is almost zero.