Hello,
I would think you could block that. Would require some thought as to best method on how you would want to limit the action item.
For requirements and the ''moving'' of items to other folders, that action name is called Requirements.Drag.
Can use workflow such as If ActionName = ''Requirements.Drag'' then...
Then would be followed by whatever criteria you would use as your basis to prevent the action.
You could try something like blocking by user group like this:
If ActionName = ''Requirements.Drag'' then
If user.IsInGroup(''GROUPNAME'') Then
msgbox ''Groupname members cannot move requirements''
ActionCanExecute = False
End If
End If
How you limit this would be up to you. Also would require some thought and possible experimentation as to what sub routine you would best want to add this code to trigger.