The services online aren't broadcasting the names of the people using their addresses- so it's basically anonymous to the common person.
It's true that without using a mixer (aka "money launderer") Big Government could seize the service to get your name... but what about https://localbitcoins.com/ ?
It's true that without using a mixer (aka "money launderer") Big Government could seize the service to get your name... but what about https://localbitcoins.com/ ?