If you modify your house wiring without a license electrical professional and or the work performed is not "up to code" with improper electrical connections you could have a major problem on your hands. Your house could burn down or worst yet your insurance company will not pay! Switching electrical circuits could easily be done with a "power line controller" modules like Insteon.
BTW ... All electrical devices have to be UL certified or other certification. To get an electrical device UL (Underwriters Labatories) cost some big bucks $$$$ -- otherwise it is a good ideal but not practical without proper certifications. :o :o :o