Japanese police wearing swords attended every lecture to "observe." Whenever words were spoken which displeased them, they would immediately issue the warning "let the speaker beware," and in more serious cases they would stop the lecture.
每場演講，日本憲警都佩刀帶劍，到現場「監聽」，一出現他們不喜歡的言論，便立刻發出「辯士注意」的警告，更嚴重時，還會終止演講。