Imagine an invading alien force which quite accidentally came to Earth via an errant asteroid.
The aliens themselves are quite unusual. They are passive, non-sentient, and they multiply under the right conditions.
Most alarmingly the aliens are quite small, they invade humans, multiply and pass from human to human... and they are miniature, unpredictable, terrorists who seemingly at whim, can kill the human host they have invaded including themselves. A sort of miniature non-sentient suicide bomber who kills the host and themselves without much rhyme or reason... although statistically we can detect a pattern regarding which hosts are more likely to trigger the attack. There is also much evidence regarding how they multiply and propagate from human to human... oddly they can be modeled on something from Earth we more commonly know as a "virus".
In a world with a proper government whose responsibility is to protect individual rights from domestic and foreign invaders, a council is assembled, and the issues debated...
How do we protect the individual rights the very right to live of our citizens from this blind insidious invading alien force?
[Edit: not sure if this should be added here or added as a new thread... actually I'd like to request Dream Weaver move it to a new thread called "Aliens and Proper Government" ]