The property options.acceptImages is not checked in two places before calling addImage() in the code for the HTML Editor:

• extractImageFromHtml()
• addFile()

I would propose that the addImage() function be modified to check the options.acceptImages at the start of the function:

  obj.addImage = function(src, asSnippet) {
        if (! obj.options.acceptImages) {
            return;
        }

Might be a good idea in addPdf() to add a similar check of options.acceptFiles at the top of the functions.

Not sure if adding a similar check to addFile() would be a good idea?