I think that the issue is to what extent we should rely on the Speaker to insist that colleagues extend a collegial courtesy to one another. There will always be ways to get around the rule stating that members cannot refer to another's absence or presence in the House. That is not part of a specific Standing Order. It is House practice, and I think it comes from the notion of courtesy towards one's colleagues. A member can call on the Speaker when he or she feels wronged by another member. The issue has been raised as to the use of electronic devices in the House. Clearly, I think the Speaker discourages such behaviour, without going so far as prohibiting it.
On April 20th, 2010. See this statement in context.