Notams are regularly released to warn about unsafe areas, e.g. Kenya:
A0040/15 - SECURITY .. UNITED STATES OF AMERICA ADVISORY TO U.S. OPERATORS CONCERNING POSSIBLE ATTACKS WITH MAN - PORTABLE AIR DEFENSE SYSTEMS (MANPADS)
ATTENTION U.S. OPERATORS: INFORMATION INDICATES THE POTENTIAL FOR TERRORIST ATTACK AGAINST U.S. AND WESTERN INTERESTS IN KENYA. WHILE SPECIFIC DETAILS ARE NOT AVAILABLE, ONE POSSIBLE TACTIC WOULD BE AN ATTACK USING MAN - PORTABLE AIR DEFENSE SYSTEMS (MANPADS), SUCH AS THOSE USED AGAINST AN ISRAELI AIR CARRIER DEPARTING FROM MOMBASA, KENYA ON NOVEMBER 28, 2002. THE DEPARTMENT OF STATE HAS ISSUED A TRAVEL WARNING FOR KENYA REGARDING TERRORIST ATTACKS.
Is there a list of these hazardous airspaces, or a site than can be checked without searching in Notams from around the world? Is there a ranking of the hazards?