I would wager you coulld weaponize a micro/cubesat enough to cause much more than icbm levels of chaos by attacking other sats (GPS, Spy, Comms, etc.) Thinking in terms of 1940's missles is a bit outdated.
Miss-iles, that's a very appropriate typo. "But I'm not planning to do any damage intentionally, and I'm expecting nothing to go wrong!" Well - the best-laid plans of mice and men often go awry, and things going wrong at orbital velocities tend to have unintended...impacts, if you will.
A person who thinks in such terms must inherently be an artifact of the past. How else could one imagine the future properly? Attacking satellites of any type, is an inherent dismissal of the idea that there could be a peaceful purpose of such a device. It is better if going forward we get a type of basis for understanding the threat models that the actions we perform necessitate. A common vocabulary is the basis of trust.