Ashrah

Okay, so I'm playing through Hollow Realization, and it details a process through which players could hack the firmware of the AmuSphere to distort or tamper with Alpha waves in order to create a similated high. In other words, VR drugs.

Due to safety features after the SAO incident, those players are subjected to autologout in the same manner as though their heart rate spiked too high or they passed out during a dive. Thing is, that means that drugs and simulated statuses, like drunkenness, are conceivable in world. 

Have fun with that info, kids.