Bannon has described China as the “greatest national security threat.”
Charges include trespassing, disorderly conduct and assault of a police officer.
Police were forced to intervene with crowds prior to his appearance at the Munk Debates.
"The last thing we need is another platform for more hate to be spewed."
The filmmaker says it's "too late" to talk about whether or not Bannon should be given a platform.
The debate will take place on the eve of U.S. midterm elections in November.
Bannon was a founding member of the website's board.
Charles Harder said Bannon broke the terms of a “confidentiality and non-disparagement agreement.”
"Steve is learning that winning isn’t as easy as I make it look."