Do you specifically train self defence?

Just thinking more about the thread Chadderz started recently about the guy using BJJ after getting punched... how often (if at all) do you train "self-defence" in your BJJ class. For example, do you drill, as a friend of mine told me Royce did at a seminar, with one glove on your hand so you can occasionally strike your partner when rolling? Do you drill moves which are not legal in BJJ comps (such as neck cranks) for self defence purposes?



I'm not suggesting "sports BJJ" is not applicable for SD situations (clearly it is, check youtube), but just wondering to you folks feel the need to make some adjustments in your training if you were training BJJ from a SD point of view?