Is Ad-hijacking or Ad-injecting legal? Or just frowned upon?
patio11: You're almost certain to fall under a broadly written computer crime statute if the D.A. has a mind to charge you.For example, in my home state of Illinois:A person commits the offense of computer tampering when he knowingly and without the authorization of a computer's owner, as defined in Section 15‑2 of this Code, or in excess of the authority granted to him: ... alters ... data;The ellipses are fair -- it really is that broad.  Bonus points: it is insta-federal because of the effect on interstate commerce, again if someone has a mind to make an example of you.