[aspen0]

You mean show different content to search engines than you show to other guests Alfa1 for the purposes of SEO? That'd technically be cloaking Alfa1 and is against guidelines and while it is a minor offense and probably wouldn't result in a penalty or ban, it is not really that worth it.

I could see offering that as a toggle in a future release, allowing you to set that in admin, leaving the choice up to you. It is actually a fairly good idea for a toggle.

I have no idea why someone would become logged out, the external link does nothing with cookies. Perhaps it is a browser issue? No one else has reported that, perhaps that user's cookies got corrupted or overwritten randomly, just as they clicked the link.

As for the powered-by link. It doesn't defeat the purpose, a small amount of link weight does pass through it, very small, a couple percent. The link is how I hope to spread the word of this plugin. Not every webmaster visits vb.org, but as sites install this plugin they'll see the powered by link, click on it, and see the explanation for what the plugin does and how it works. Its in the template, I can't force you to keep it, but I'd rather you keep it. This plugin is free, with the powered link you're still saving an enormous amoung of the link weight you would be losing without this plugin. It seems a small price to pay, but it is on the honor system.