Hey guys - Brenden and the gang are actually going to be getting ready to head off to Sydney (last I heard, they leave Sunday?), so they might not see this feedback for about a week or so. (I'll make sure to send the topic to them when they get back, though, if they miss it!)
I will say, though, that each time we run lectures, we run into these issues. People being unruly/rude, people not being focused or paying attention and, worst of all, people just not showing up. Most of these lectures were completely booked out - did you see an empty seat in your lecture theatre? (ignoring the third English lecture - that was cray cray, yo) Don't even get me started on the amount of food that was ditched in the theatre during the winter lectures last year (and by food, I mean there were fish and chip packets with food still in them lying around)
Of course, we hate that people like you guys feel disadvantaged by this stuff. As you said, it sucks for us who want to put a good show on for you, but even moreso it sucks for you guys, who lose what could be an absolutely fantastic experience. Because of this, we've come up with quite a few plans, contingencies and work-arounds to try and stop it all. Charging kids was something we looked into, but the problem is that, as has been outlined before, the moment you charge money, even just a little bit, you lose people who just can't do it. It might be hard to imagine for you, but some people can't even sacrifice $5 to attend these lectures, and they're some of the most diligent of the lot. They're the kids who I ask if they want the notes, they blush a little, quietly shake their head, and then proceed into the lecture and take as many notes as they can. They're the ones who can't attend any other company's lectures, and they're some of the ones who benefit most out of us doing this.
Obviously, we don't want to lose them - they're partly the reason this whole thing was started! So, charging becomes out of the question. We also looked at things such as paying a $5 deposit which we'd reimburse when they came to the lecture - the problem with that is that then it HAS to go through the parents, and not all parents are open to this kind of thing. (particularly when it becomes a case of money - "are you sure it's worth the money? I just don't want you wasting on a useless experience...") Obvious exception if the kid has a debit/credit card, but you have to be 18 to have one of those, and not every year 12 is 18 even at the end of the year. (hell, I know people that weren't 18 until their second year of uni!) Not to mention that it would be too hard to try and work out the reimbursing process that would have to follow.
Not that your suggestions are bad - I can guarantee you 100% that Brenden will read over them and consider them as much as possible, because he's just a top bloke like that. But that's just some insight as to why we haven't moved to charging for the lectures, even after seeing the behaviour repeat time and time again.