Are 叫 and 让 actually used in place of the passive marker 被?
被 can be followed by a verb or a noun


Example: 

他被杀死了 - he was killed (杀死 is a verb)

他被某人杀死 - he was killed by someone (某人 is a noun)


  让 means 'allow; let;' (must be followed by a noun)


Example: 

不要让人杀了 (don't let people kill you/ don't be killed by someone)


  叫 means 'make; cause' 


Example: 

叫人煩惱 - make people upset (it is not a passive marker)