  Black hole complementarity was a consensus among string theorists for the
interpretation of the information loss problem. However, recently some authors
find inconsistency of black hole complementarity: large N rescaling and AMPS
argument. According to AMPS, the horizon should be a firewall so that one
cannot penetrate there for consistency. There are some controversial
discussions on the firewall. Apart from these papers, the authors suggest an
assertion using a semi-regular black hole model and we conclude that the
firewall, if it exists, should affect to asymptotic observer. In addition, if
any opinion does not consider the duplication experiment and the large N
rescaling, then the argument is difficult to accept.
