Domestic terrorism

About
Domestic terrorism is terrorism used by citizens within their own country. Possibly the most famous recent example in the 🇺🇸 is the 1995 Oklahoma City bombing.

Propaganda
Governments who want to convince people that a certain act is really bad, especially if no obvious harm can be demonstrated (as in victimless crime), will often label the act as domestic terrorism. Examples include:
 * the Liberty Dollar trial
 * the entire "War on Drugs" is couched as a fight against the supposedly-terroristic act of manufacturing, selling, and even buying of psychoactive drugs

Reference

 * ("democracy and domestic terrorism" section of "terrorism" page)
 * actually has a good example not mentioned by Wikipedia: animal rights terrorism
 * has a substantial article discussing definitions and giving other examples
 * has a substantial article discussing definitions and giving other examples