AN A320 PARKED ON GATE WITH PAX DEPLANING WAS TAIL LOW AND WAS LOWERING ON TO A LAVATORY TRUCK. SEVERAL PROCS WERE VIOLATED IN THIS INCIDENT.

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WHILE PARKED AT THE GATE JUST AFTER ARR; THE FO PROCEEDED TO THE RAMP TO ACCOMPLISH THE WALKAROUND FOR THE CONTINUATION OF OUR FLT. AS HE WALKED CLOSER TO THE REAR OF THE ACFT; HE NOTICED THE TAIL EXTREMELY LOW TO THE GND. HE IMMEDIATELY WENT TO THE RAMP PERSONNEL UNLOADING THE FORWARD PIT AND ADVISED THEM TO STOP. HAD THE PROCESS CONTINUED; A LAVATORY TRUCK WOULD POSSIBLY BEEN CRUSHED AS THE TAIL DROOPED FURTHER AFT. WHILE I WAS LOADING THE FLT PLAN INFO INTO THE FMGC; I NOTICED THE ECAM GEAR SHOCK ABSORBER FAULT INDICATING THE FULL STRUT EXTENSION OF THE NOSE STRUT. IT LASTED ABOUT A MIN AND WENT AWAY AS MORE PAX DEPLANED. IT WAS FURTHER NOTED THE CLEANERS (7 OF THEM) HAD COME ON BOARD IN THE AFT DOORS MAKING THE PROB WORSE. I SPOKE WITH THE RAMP SUPVR AND INFORMED HIM HOW DANGEROUS THIS SIT COULD HAVE BEEN. HE RESPONDED WITH A PROMISE TO CORRECT THE PROB. I'M CONCERNED SOMEONE COULD GET HURT; WE COULD SEVERELY DAMAGE AN ACFT AS WELL AS OUR REPUTATION WITH AN AIRBUS SITTING AT THE GATE WITH IT ON ITS TAIL.