Hi,
Internet Explorer 11 - I know old but, still sadly used I have a button component on a page and set it to disabled and add a click event handler to show a notification. When the page is displayed in IE, it is greyed out (as expected) but, the button click event still fires and the notification is displayed when I click on the disabled button.
Chome - Same page as above. When loaded in Chrome the button is greyed out the click event handler doesn't execute if I click on the button (as expected). If I put (for example) a left margin (say 20px) onto the same button, now try in Chrome, if I click on the visible part of the button and the click event handler doesn't fire (again as expected). If I click slightly to the left of the visible part of the button (i.e. in the margin), the click event handler now executes even though the button is disabled.