OK here is my question,

how the heck did he get to do this? I am not nearly aware enough of boats and ships to know what would happen if the anchor had grabbed on to something. But from a security aspect, how did this drunk guy get into an area where this can be done?

I am truly sorry that anyone was put into any form of danger and that anyone was put at risk. You would think that if dropping an anchor is a dangerous as we think, that there would be more security to prevent it happening (beyond a camera) when someone hits a fifth of vodka and is feeling all nautical.