I'll second what Brian said, if you read the GMANE FAQ it says that the general consensus in the anti-spam community is that spam bots don't do even trivial unobfustucation, at least for now. On Wed, 2003-05-07 at 16:35, Jeremy Newman wrote:
I configured the mailing list archives to obfuscate emails now. All new messages will have this. It is a simple form of protection at the moment. It simply changes the emails to this: jnewman_at_codeweavers.com.
I don't think this may be enough protection however. I can go one step further just make the emails totally invalid. something like jnewman(a)email.domain.hidden
I'm in favor of the later option. Anyone have opinions on this.
Note this only affects new posts, for old posts in the archives, I will write a script that does the same.