Post Level Restriction in the wordpress database

We currently do not restrict our content in the first month the items are in the database (about 30-50 articles a month) and then when the next month of articles are put in we are currently manually go through each of the articles and setting a ‘Post Level Restriction’.

I was hoping to write a script that would query the posts for every post that is older than a given date and does not have a ‘Post Level Restriction’ set and then set it to the proper level.

What do you think?

https://wordpress.org/plugins/s2member/