How do you address that one miscreant?

It's a question Elinor Ostrom answered with her design principles for governing the commons :)

8 Principles for Managing a Commons

1. Define clear group boundaries.

2. Match rules governing use of common goods to local needs and conditions.

3. Ensure that those affected by the rules can participate in modifying the rules.

4. Make sure the rule-making rights of community members are respected by outside authorities.

5. Develop a system, carried out by community members, for monitoring members’ behavior.

6. Use graduated sanctions for rule violators.

7. Provide accessible, low-cost means for dispute resolution.

8. Build responsibility for governing the common resource in nested tiers from the lowest level up to the entire interconnected system.

In this case, the problem is caused by lacking governing rules for local conditions. One can provide free and shared access to a good like the drives, but also ask for usage. This might be access just by key - people are still free to use the goods but need to show up and talk with other members of the community, creating a social monitoring system running on shared responsibility and trust. (I give you the key because I trust you, that you won't do harm.)