Interesting discussion.
I think the spidering concerns are valid, but the change proposed here doesn't affect spidering or spam. As long as your username is a clickable link that goes to your profile and your profile contains a real e-mail address, then you're at risk of being harvested. I happened to look at the phys49's posting as an example, and that's an interesting one. If he only uses phys49 as his handle on this board, then it's definitely being harvested if he's getting spam addressed to phys49. Interestingly, that spider is dumb since the e-mail address in his profile *doesn't* start with phys49.
My ISP allows me to set a first level SpamAssassin filter, so if I was harvested here, I don't really know about it consciously. I suspect that may be the case for others here as well.
If I read the first post correctly, the proposed change is really more along the lines of giving people an opportunity to respond and refer to others by their real name vs. handle. I don't personally have a problem with that change, and don't think that it will have much spamish effect.
In a perfect world (and this *is* the Alembic board after all!), I think we'd really want to make a slightly deeper change to make everyone happy. In addition to allowing you to enter your name and e-mail address in your profile, you should probably be given a check box to let you choose whether either of those items would be visible elsewhere in the system. This would allow everybody to enter their real name but control whether or not it appeared on the left side info. Likewise for e-mail, although I doubt that you'd actually want to attach an e-mail address to individual postings. I think a flag on your e-mail field would be better used to control whether your e-mail was displayed or not in your profile (this allows the administrators to have a reference to all users, but each person can make a decision about whether that info is public or private.
Finally, since I'm on a roll, as a final anti-harvesting measure, you might want to create an image or otherwise obsfucate the e-mail address so it's less accessible to a spider.
Since the webboard software in use here is proprietary, these sorts of changes are not something we can do, but it would probably be a good input to their suggestion box.
David Fung