Also, modules included into Object need to be scanned and have their instance methods removed from blank slate. In theory, modules included into Kernel would have to be removed as well, but a "feature" of Ruby prevents late includes into modules from being exposed in the first place.

Methods
Public Instance methods
append_features(mod)
     # File lib/blankslate.rb, line 101
101:   def append_features(mod)
102:     result = blankslate_original_append_features(mod)
103:     return result if mod != Object
104:     instance_methods.each do |name|
105:       BlankSlate.hide(name)
106:     end
107:     result
108:   end