Well, as a DBA, I periodically use a 3rd party tool to print out the schema. It's mainly for new hires to learn from.

But sometimes I'll flip through it and notice:

- mis-spelled table names, usually duplicate tables

- missing FKs

- missing unique keys, most commonly for early RoR apps

- developer-specific EAV tables with 1 row.

The benefit always outweighs the dead trees, but printing once a year is typical. Back in the day, more frequenctly on 25-line terminals where there was too much scrolling.