C172 ACFT ON TFC WATCH MISSION OVER SPORTS VENUE ENCOUNTERED MULTIPLE ACFT AT VARIOUS ALTS. ALL THE ACFT SHOULD HAVE HAD XPONDER CODES ASSIGNED BY ATC AND ALSO IN CONTACT WITH THE LCL TWR. APPARENTLY THERE WERE ACFT FLYING AT WILL CAUSING MULTIPLE EVASIVE MANEUVERS BY OTHER ACFT AND UNCOORDINATED TWR CTL.

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WHILE FLYING TFC AT A SPORTS VENUE IN TX; I HAD 3 NEAR MISSES WITH UNAUTH FIXED WING TFC. ALL ACFT AROUND THE VENUE WERE REQUIRED TO HAVE A PRIOR PERMISSION REQUEST AND A SQUAWK CODE FROM THE FT WORTH GADO. ROTOR WING TFC (SHUTTLES) WERE 300-500 FT AGL; TV ROTOR WINGS WERE 700 FT AGL; AND TFC WATCH FIXED WINGS WERE 1000-1700 FT AGL. NO ACFT WITHOUT A PRIOR PERMISSION REQUEST AND CODE WERE ALLOWED IN CLASS D AIRSPACE. AFTER THE EVENT; AFW TWR ALLOWED IFR DEPS TO DEPART THROUGH THE AIRSPACE OVER THE VENUE. A MOONEY CROSSED BELOW ME AT ABOUT 800 FT AGL BTWN ME AND THE ROTOR WING TFC. I RPTED IT TO THE TWR. 30 SECONDS LATER; AN A36 CAME ACROSS THE VENUE AT MY ALT AND TOWARDS ME. HE SAW ME; TURNED AWAY AND CLBED ALMOST HITTING A SECOND TFC WATCH CESSNA AT 1650 FT AGL. THIS TIME WE BOTH CALLED THE TWR; TFC WATCH AND TV USE 123.02. WE WERE USING 135.15 AFW. 30 SECONDS LATER THE THIRD ACFT; A LIGHT TWIN; WAS COMING THROUGH IN A CLB. I CALLED THE SECOND TFC WATCH AND SAID; '12 O'CLOCK AND CLBING.' HE REPLIED WITH; 'HEY TWR THESE SONS OF BITCHES ARE TRYING TO KILL US UP HERE -- WHAT ARE YOU PEOPLE TRYING TO DO TO US?' THE TWR REPLIED WITH 'THEY ARE SUPPOSED TO STAY CLR OF THE VENUE.' PROB: INEXPERIENCED PEOPLE IN THE TWR. CTLRS NOT PAYING ATTN TO THE SIT. AT ANY ONE TIME THERE WERE: 4 BANNER TOWERS AT 1200-1300 FT AGL; 8 OR 10 SHUTTLE ROTOR WINGS; 4-6 TV ROTOR WINGS AND 3 TFC WATCH FIXED WINGS. ALSO; LARGE NUMBERS OF ACFT OUTSIDE THE CLASS D LOOKING IN. AT NO TIME DID ANY OF THE PRIOR PERMISSION REQUEST TFC HAVE ANY TROUBLE WITH ANOTHER PRIOR PERMISSION REQUEST ACFT.