Fine, they burn down their own house. But hopefully, the fire investigation crew can prove that the homeowner did in fact tamper with the wiring. If not, you're the last person who touched the wiring, because the homeowner's last invoice says so. Now it's you paying the piper, instead of the homeowner.
With the litigious society we live in today, we almost need to put tamper indicative seals in place so we can prove if somebody has been goofing around.
