PA18 PLT HAD A HELI FLY LOW OVER HIS ACFT WHILE PARKED AT THE FUEL PIT. ROTOR WASH WAS THE PROB.

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SUPER CUB; UNOCCUPIED BUT FULL FUEL; READY FOR ENG START; PLT (ME) HOLDING EMPENNAGE. ACFT AS CLOSE TO FUEL PIT AS POSSIBLE. SMALL BLACK HELI ON APCH TO A BLOCKED TXWY PASSED WITHIN 50 FT (2 WING SPANS). WIND WAS 6-10 KTS RPTED; AND FAVORABLE; BLOWING ROTOR WASH AWAY FROM FUEL PIT AND PARKED ACFT. WITH ME HOLDING ON; THE OVER 1200 LB SUPER CUB WAS MOVED LESS THAN 6 INCHES; A NON EVENT. WHAT IF THE WIND WERE FROM THE NW; AND THE ACFT WAS MY 725 LB PIPER J3? WOULD IT HAVE BEEN BLOWN INTO THE FUEL PUMP? THERE ARE FEW RESTRS ON HELI OPS AT MYF; AND SEEMINGLY NONE ON HOW CLOSE A HELI CAN COME TO A PARKED ACFT (OR STROLLING PLT?). I KNOW OF TWO: 1) CROSS THE FIELD AT OR ABOVE 1000 FT AND 2) REMAIN S OF TXWY H. DEPENDING ON YOUR VIEWPOINT THAT'S EITHER A LICENSE TO DO ALMOST ANYTHING; OR A POTENTIAL ACCIDENT. I AM SURE THE FOREGOING IS ENOUGH; BUT I CAN'T RESIST A FEW MORE COMMENTS. MY ACFT IS VERY MUCH LIKE A HELI; AND WITH TWR CONCURRENCE I FLY UNUSUAL PATTERNS. BUT I WOULD NEVER BE CLRED TO CROSS THE ARPT AT OR ABOVE 1000 FT WITH ONLY THE ADMONITION THAT 'THERE ARE ACFT IN THE PATTERN.' NOR WOULD I OVERFLY A PARKED ACFT AT ANYTHING LESS THAN 400 FT AGL (EXCEPT FOR THOSE IN THE RUN-UP AREA). WHY; THEN; WOULD A HELI BE PERMITTED A TRANSIT DIRECTLY THROUGH 2 TFC PATTERNS WITHOUT MORE THAN 'SEE AND AVOID' SEPARATION; AND THEN BE PERMITTED TO LAND NEXT TO ITS HANGAR ON AN UNMARKED TXWY; 100 FT DOWNWIND FROM A CROWDED LIGHT PLANE FUEL PIT? AM I MISSING SOMETHING HERE? OR AM I JUST OLD AND ORNERY?