Why do people even ask this question:
1: Theoretically yes you can.
2: You have a damn death wish if you choose to do so
3: When the EPA shows up at your house to remove your mercury contaminated butt, don't say that I didn't tell you "I told you so"
The heat from the computer will cause fumes. The mercury in contact with the air will cause fumes. The fumes are then inhaled and are ingested by your body. Mercury starts destroying nerological systems in the body and eventually makes you go crazy. You die in a hazy of insanity truly not even aware your sick.
Also, to even possess such amount of mercury you have to have a permit and such. You do so without one and I smell lawsuit.