<p>the gsi or professor might bounce you out, if they notice and care. </p>
<p>Also, for a very few courses that are in great demand and limited availability, the department offering the course may have a coordinator assigned who will scan through the registered and wait lists, bumping off people that don’t meet various criteria and taking people off the waitlist in a nonsequential manner. For example, Bio 1A and Chem 3A/3B pre-med courses have some scrutiny and do unilateral drops when they are trying to accommodate as many students as possible into the labs and classes.</p>