I hear what you are saying, Shaggy... but there are several reasons to add this change.
For a forum where 95% of the members are former military members over 60 years old, it comes in handy! In our case, some of the prospective members are known to the Administrator. Besides, there could have been prior external communications between the Admin and the potential member. You say "...administrators should not be activating accounts", but that is based on *your* opinion, right? Other forum Admin's circumstances may be different. So since you think that activation is a taboo, you wouldn't add it at all? ...even though, as you recommend, it never be used?? You aren't a Republican, are you?? They always seem to know what's best for me and my family. <insert heavy dose of cynicism here!>
And one more reason to implement this change: Requiring email validation really cuts down registration by idiots who just want to post links to porn and such. When a registration is received that 'looks' okay, the Admin has the option to immediately activate the account. If hindsight shows that the User violates the terms of forum use, the 'trash can' icon works well. Our forum Admin thinks of it as 'selective email validation'.
If it weren't for IE 'remembering' passwords, most of our members couldn't log in the day following registration.

It is NOT because these men are stupid. It is because they are older and did not grow up in an electronic world. I don't know how old you are, sir, but you may experience some of these traits some day.
I would still recommend putting the change in. If it is never used, then email validation is never "compromised" as you imply. When needed, it is at your fingertips... like a spare tire.
Sorry for the long post. Perhaps others will add their thoughts.
gary b
ADDENDUM
Just checked our forum. Pending registration as follows:
First name: bbfosamaxb
Last name: bbfosamaxb
Email: bbfosamaxb@mail.ru

You think this dude will get 'activated'??<