User Interaction Features to disable when content is @hidden

Methods
object method on @hidden content comments
media * supported  
track * supported  
input stepup disabled? changes the control. should this be allowed?
input stepdown disabled?  
input all other input methods supported  
select add supported? changes control, but is the sort of thing you might want to do before displaying
select add supported? changes control, but is the sort of thing you might want to do before displaying
input/textarea text selection methods http://dev.w3.org/html5/spec/textFieldSelection.html#textFieldSelection disabled changes caret position
form elements constraint validation methods
http://dev.w3.org/html5/spec/constraints.html#the-constraint-validation-api
supported  
window window methods
http://dev.w3.org/html5/spec/browsers.html#apis-for-creating-and-navigating-browsing-contexts-by-name
?? I don't think these can be inside hidden elements
dialog all dialog methods
http://dev.w3.org/html5/spec/commands.html#the-dialog-element
disabled should not be creating or acting on dialogs from within hidden content
form submit disabled unexpected state change(WCAG failure)
form submit disabled? not sure if this causes the same problems as submit
element focus disabled can't focus hidden content
element blur disabled Since elements aren't focusable, this shouldn't be possible
element click disabled can't activate hidden content
element all drag and drop methods http://dev.w3.org/html5/spec/dnd.html#dnd disabled  
       
       
Attributes
element attribute on @hidden content
all autofocus disabled
     
Events
object event  on @hidden content
input change disabled
select change disabled