This could be mitigated by TaskRabbit cooperating with an insurance provider and selling "insured" work. There are great margins on insurance as we all know. In their TOS TaskRabbit basically says "TaskRabbit.com Only Provides a Venue" (check it out: http://www.taskrabbit.com/tos). Why don't some retail-insurance megacorp approach them? This could be TaskRabbits no1 source of income instead of their no1 problem...