RPTR PROTESTS THAT PREVIOUS FLC BOOBY TRAPPED HIS ACFT.

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THIS SITUATION HAD A SNOWBALL EFFECT. PLANE SWAP IN PHX WITH ANOTHER CREW FOR LAST LEG HOME TO FMN. PREVIOUS CREW FELT IT WOULD BE FUN TO MESS WITH ACFT FOR NEXT CREW. FIRST WAS THE STACK OF PAX BRIEF CARDS I FOUND IN COPLT'S SEAT. WHEN I ASKED PREVIOUS CREW ABOUT IT THEY SAID IT WAS EXTRAS FOR PHX STATION. I NOTIFIED RAMP AGENT AND THEY REMOVED THE CARDS (NOT GETTING THE JOKE EITHER). INSPECTING ACFT DURING PREFLT FOUND L POS LIGHT INOP. THIS PUT US 40 MINS BEHIND SCHEDULE. AFTER TKOF THINGS STARTED HAPPENING. FIRST THE PRESSURIZATION WOULDN'T WORK; SO I HAD THE COPLT TROUBLESHOOTING THIS; TAKING HIM OUT OF THE LOOP FOR KEEPING ME; OR BOTH OF US; OUT OF TROUBLE. NEXT; THE CAPT'S AIR VENT WAS CLOGGED WITH PEANUT SHELLS; AND AS I OPENED IT; YOU CAN GUESS WHAT HAPPENED. 10 MINS AFTER DEP; PEANUT SHELLS WERE STILL COMING OUT; THE PRESSURIZATION SYS WAS STARTING TO WORK; AND I'M WONDERING WHAT TO FIND NEXT. THE NEXT THING TO HAPPEN WAS I FOUND MYSELF RAPIDLY CLBING THROUGH 13300 BEFORE I REALIZED IT -- CAUGHT MYSELF AND DSNDED RIGHT AWAY TO ASSIGNED 13000. THE CTLR NEVER CALLED US ON IT (LUCKILY) BUT AFTER FLYING MOST OF THE DAY; I WASN'T READY FOR FUN 'N GAMES. ALSO; TO COMPLETE MATTERS; IT WAS ALSO NIGHT TIME AND COCKPIT VISIBILITY IS GREATLY REDUCED. MY PERSONAL OPINION IS PROFESSIONAL AND MESSING WITH THE ACFT DOES NOT PROMOTE A SAFE ENVIRONMENT. I HOPE THERE WON'T BE A NEXT TIME!