Dear Geist,

Is there some way for me to post a 9-panel comic on my Tumblr blog so that no one can steal it?

Dear Lila,

In a word, no. Anything available online or in hard copy can be taken. Some takers ask permission, others do not. You can search for stolen images online with software (TinEye, PicScout, Digimarc and others). If you believe your copyright has been violated, it's up to you to take any legal action.