AN A319 CAPT RPTS GND PWR CORD BEING PULLED WITHOUT ADVISING FLT CREW. DISCUSSED ACTION WITH RAMP PERSON AND EXPLAINED RESULTING ACFT PROBS AND POSSIBLE INJURY TO GND PERSONNEL.

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RAMP PULLED THE PWR CORD WITHOUT ASKING OR CHKING PWR LIGHT. BLANKED CAPT MCDU TEMPORARILY AND LOST A COUPLE OF ODD BITS OF DATA. WE HAD TO RECHK ALL THE PROGRAMMING; NEARLY CAUSING A DELAY. I WENT DOWN AND TALKED TO THE RAMP MAN. MY EXACT WORDS WERE; 'YOU HAVE TO ASK US BEFORE YOU PULL THE PWR.' I THEN TOLD HIM IT SOMETIMES DUMPS COMPUTERS; BUT MORE IMPORTANTLY WENT ON TO EXPLAIN HOW BADLY IT COULD INJURE HIM UNDER THE WRONG CIRCUMSTANCES. I WAS A MIL ACFT MECH AND GAVE HIM AN EXAMPLE OF HOW AN ARC JUMPED 3 FT AND INJURED MY FRIEND BADLY. I DON'T THINK IT SUNK IN. HE LOOKED AT ME BUT DIDN'T SAY A WORD. BECAUSE I DIDN'T THINK HE UNDERSTOOD THE RAMIFICATIONS OF WHAT COULD HAPPEN TO HIM; I STOPPED AND TALKED TO A RAMP MGR AND TOLD HIM I THOUGHT HIS GND PEOPLE COULD USE SOME EXTRA TRAINING ON WHEN AND HOW TO SAFELY PULL THE PWR CORD. I REITERATED TO HIM HOW YOU COULD GET AWAY WITH IT 500 TIMES AND ALL OF A SUDDEN IT COULD ARC AND KILL. THERE CAN BE NO ACCEPTABLE LOSS LIMITS. THIS PROB IS NOT LIMITED TO ZZZ -- I SEE IT THROUGH THE SYS.