As others have mentioned and explained: Bitcoin isn't really that anonymous unless you personally put quite a bit of effort into making it so.
I think that's the kind of "lobby work" we can do: Spread the truth so people have the opportunity to get the correct information instead of falling for people / institutions trying to create a panic.
See also:
Weaknesses - Tracing a coin's history
https://en.bitcoin.it/wiki/Weaknesses#Tracing_a_coin_s_historyAnonymity (directly linked from the first link)
https://en.bitcoin.it/wiki/AnonymityQuote: "While the Bitcoin technology can support strong anonymity, the current implementation is usually not very anonymous." and "The main problem is that every transaction is publicly logged. Anyone can see the flow of Bitcoins from address to address (see first image)." ... that can either be considered a problem or a benefit - after all, transparency can be a really nice thing when everyone has access to it ;-)
I've just sent a letter to the editor of Spiegel Online which wrote in a (critical) article about the BVDW warning "Die Transaktionen lassen sich prinzipiell nicht nachverfolgen," (the transactions cannot be traced in principle) letting them know that's factually wrong, at the same time letting them know I appreciate that they expose the BVDW warning for what it is: An attempt to create a panic.
Here's a link to the article (it's German):
Wirtschaftsverband erwartet Bitcoin-Verbot
http://www.spiegel.de/netzwelt/web/0,1518,766167,00.html