Unprotected Stabbing

Around 500,000 people, plus one Chancellor Angela Merkel, attended the Berlin festivities Friday for the opening of Berlin's "huge, ultra-modern", new main railway station.
Mike P, a 16 year-old kid, "the child of a broken marriage" and "described as drunk" yet "generally a pleasant boy" according to his school principal, goes nuts and stabs at least 36 people.
"One of his first victims was a carrier of the virus which causes AIDS, prompting fears that others who suffered stab wounds or were splattered with blood could be infected. The Charite, a hospital near the scene of the attack, is to give 37 people anti-HIV drugs as a precaution and then test them regularly for HIV infection." News

Maybe the guy didn't like the music or the fire work! What message does one give in such situation? Put condom on your knife when you go stabbing folks at random? What would André Breton have said?