When your CD drive begins opening and closing by itself, the answer could be as simple as a faulty eject button. You may be able to easily solve this, and other similar problems in electronics, by replacing the cheap (and often faulty) tactile switch(es). You most likely do not have a poltergeist.
0:00 - Introduction
0:33 - Fault speculation
3:06 - Testing the theory
4:28 - Finding a new switch
5:49 - Testing the repair
8:33 - Conclusion & thoughts