If you enter a '.' as your surname, will G+ omit this when displaying your name?

Note that your link doesn't appear to say anything about that. Might you be seeing an internal revision? (The current revision visible to the public appears to predate the policy change; perhaps a new version was meant to be pushed but has not been.)

Please. I laughed so hard it hurt just now.

First of all, thanks a lot. So that'd be the way to sign up as "Ben".

Now please revisit my original post. Did you notice what my name was, before the profile got blocked? I'll post it again. It was "Ben .".

Now this hotel bar has to help me forget this link of yours as soon as possible or I'll shake my head until it falls off..