can i accurately reword your question as "what is an appropriate anarchist response to being called terrorists?"?
if so, then i would say that my type of anarchist doesn't worry about what they're called by the state. my kind of anarchist expects that the state is going to do what is most convenient for it, and will lump us in with whoever it doesn't like at the moment, in whatever way seems most tactical for it (whether that means to ignore that anarchists even exist, or to lump us in with communists, or to call us drug dealers, or to call us terrorists, etc).
for those who are more concerned with making anarchists more popular to normal people, then there are multiple tactics - informing people about the violence of the state (who is the real terrorist), or about the popular things that anarchists have done (significant parts of popular changes like 8 hour work days, etc), or about how anarchists want and believe things that most normal people want and believe too (a la crimethinc)...
but perhaps i still didn't understand the question?