Create a Volume Group to prevent writing to a tape

Would it seem fair to do the following

1. create a volume Group with a meaningful name like 'DoNotWriteTo'

2. Add in tapes that are taken offsite for permanent retention

There is a situation where we need to set a very high and one off retention period on a couple of tapes. Rather than use the Retention levels, the boss wants to just pull them from the Library.

I'm thinking that a separate Volume Group might just prevent the tapes from being rewritten to if they are accidentally put back in the Library. An additional safeguard if you will.