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@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.