we had a morning tea and the careers advisor was like a hawk asking everyone their UAIs...well all the teachers were pretty interested anyway so if she didn't find out then the teachers would've passed em on. Though i think my school (and most others) would do it for statistical purposes - to see what happens to kids from your school and how your school is improving , how the faculties have improved/could improve and how this has ultimately impacted your further study.
also what options to stress more to you ie. UWS and UOW were stressed to the non-selective kids at our school, and i mean STRESSED it was rammed down their and our throats too...kinda scary but when you think about it, the bonus point system is what allows some of those people to go to uni, so i reckon it's all worth it in the end
hope i made some sense amongst all that rambling