Reminder to Read the Simple Sabotage Field Manual

The Simple Sabotage Field Manual was a document created by the United States, for advice on how to sabotage (primarily) socialist nations, much of which is still relevant today.

Even if you can't, or don't want to read the whole thing I'd advice you at least read the section titled "General Interference with Organizations and Production" for examples of how a saboteur may attempt to infiltrate and disrupt an organizational or productive group.