Pretty sure it is. If you need serious anonymity, like if your life depends on it, get a botnet and use the trojaned PCs as proxies. Use public WiFi, and use cheap laptops that you replace regularly and/or VMs, and don't forget to fake your MAC address. Create multiple fake personas to confuse attackers. Have stuff you write rephrased by someone else, so they can't do a corpus analysis on your writings. Do as much offline as possible. If you have to transfer information, avoid the internet. Use dedicated lines, dialup, dead drops, etc. etc.
