If your list is that simple, it takes no extra effort to add closing tags (especially if you're using a worthwhile IDE). If your list is more complicated, the c

If your list is that simple, it takes no extra effort to add closing tags (especially if you're using a worthwhile IDE). If your list is more complicated, the closing tags will increase readability while decreasing ambiguity (and again they require no extra effort in a good IDE). This kind of thing might make sense for Google as a way to cut down on bandwidth costs over a long period of time, but it's a bad practice for 99% of the people reading it.