Isn there any criteria that the instructor will use to select crashers, like picking graduating seniors first?
No. These things will NOT give you a priority as a crasher: signing the crash list first, being a graduating senior who needs this class to graduate, having tried to enroll for the last 2 or 3 years, having taken the lecture already, being a higher class level (Jr. vs Soph., for example), needing just one more unit to get your student loans deferred, needing just one more unit to qualify for financial aid, having been ill, having a relative who has died or been ill, forgetting to register as soon as your priority allowed, being a graduate student, or being involved in the Greek System, to name just a few. In other words, nearly all circumstances that arise outside of Biology 100 Lab will not help you get an add code.
