Because it could be a dead give away to if someone is in danger around you.
Explanation :
In simple words, The most popular type of anti-slavery resistance was "daily operations resistance." Slave resistance took many forms, including breaking equipment, feigning injury, staging sluggishness, and committing acts of arson as well as sabotage. One form of resistance was fleeing.
Thus, their resistance was operating at a very personal level. Although, the slavers took some strict actions against it, such as, shooting the resistance candidate on the stop just to make a point of fear.
He compared it to a tiger because they were fierce warriors
The answer to your question is: one unique way in which the medium of print such as magazines and newspapers can affect a massage is by letting the audience review and reflect.
Claims that a state in theory has the right to nullify or invalidate and federal law that state deems unconstitutional.