Connection to the public internet requires that random people on the internet be able to burn some CPU time on your machine. This is the nature of the internet - everyone with a public and routed IP address signs up for this when they join the network.
Though surely speaking to the choir on here, it is precisely this end to end connectivity that should be fought ever so strongly for. Equally as strongly and if nor more than anonymity. Because without that, anonymity would never reach it's destination. Well said, OP.