Correct. I have three options here: 1) use my personally identifiable username and risk jeopardizing my reputation both on Wikipedia and in real life, 2) create a second account and violate policy, or 3) post legitimate content from an anonymous IP address which (without a warrant) cannot be used to personally identify me.
On a side note, there is an increasing risk of having an account compromised when using a public terminal, network, or WiFi hotspot. 69.117.250.169