"hello hacker fucker" is probably the most notorious; at one point it was even the tcrf april fools gag (Matt Furniss's Broken Leg Emporium, don't tell him)
but my favorite is probably from Deadly Towers:
DISASSEMBLE? HELLO ! THIS IS DISASSEMBLE MESSAGE FOR YOU. THIS PROGRAM WAS MADE IN JAPAN TOKYO 10 NOV 1986 COPY RIGHT BY IREM CORP.PROGRAMMED AND LICENSED BY LENAR SPLENDOR TEAM GOOD BYE !
DISASSEMBLE? HELLO ! ... it's just so jolly.

