B737-300 FLC INITIATES EVASIVE WAKE TURB TURN FROM PREVIOUSLY DEPARTING B757 FROM SFO ONLY TO BE CHIDED BY O90 CTLR.

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WE (ACFT X) WERE DEPARTING RWY 1L AT SFO; ON A SFO-8 DEP; WHICH REQUIRES A R TURN TO 030 DEG HDG; AWAITING VECTORS ON COURSE. WE DEPARTED FOLLOWING A B757 (ACFT Y) WHICH HAD TAKEN OFF FROM RWY 1R AND WAS ABOUT 4 MI UPWIND WHEN WE BEGAN OUR TKOF ROLL. AFTER AIRBORNE; WE BEGAN A 15 - 20 DEGS; ANGLE OF BANK TURN TOWARDS A 030 DEG HDG. AT ABOUT A HDG OF 020 DEG; WE BEGAN TO FEEL THE FIRST NIBBLE OF WAKE TURB; AND I TOLD THE CAPT THAT I WOULD STOP MY TURN THERE (020 DEG HDG) INSTEAD OF CONTINUING FURTHER INTO THE POTENTIALLY DANGEROUS ZONE OF WAKE TURB WHICH WAS TOWARDS OUR R. AFTER ONLY SEVERAL SECONDS OF A ONCE AGAIN SMOOTH RIDE; WE AGAIN ENCOUNTERED WAKE TURB; THIS TIME MUCH MORE SEVERE THAN THE FIRST. COUNTERING THE ROLL INDUCED BY THE B757'S WINGTIP VORTEX REQUIRED CLOSE TO 90 DEGS OF YOKE DEFLECTION. I THEN ATTEMPTED TO TRY TO CLB ABOVE THE PRECEDING ACFT'S FLT PATH AND TURN BACK FARTHER L (KNOWING THAT WINGTIP VORTICES FLOW AFT; OUT AND BELOW THE GENERATING ACFT'S WINGS). ALREADY AT OUR PROFILE CLBOUT SPD (V2 + 20) I WAS UNABLE TO ESCAPE THIS POTENTIALLY DANGEROUS SIT VERTICALLY (AND THE WATER WAS LESS THAN 1000 FT BELOW ME) SO A SLIGHT TURN TO 10 DEGS REMEDIED THE PROB. MY CAPT THEN MADE A COURTESY CALL TO BAY APCH TO INFORM THEM THAT WE HAD ENCOUNTERED WAKE TURB AND; AS A RESULT; HAD TO ROLL OUT ON A HDG OF 010 DEGS. ALTHOUGH I AM POSITIVE THAT THE CTLR WOULD NOT HAVE BEEN ABLE TO DETECT VIA HIS RADAR THAT OUR FLT PATH WAS DEVIATING FROM 'NORMAL' AT THIS TIME; ONCE HE WAS INFORMED OF OUR DEV BY MY CAPT; HE INCREDIBLY GAVE US A HARD TIME FOR DEVIATING FROM OUR ASSIGNED DEP. IN FACT; HE TOLD US THAT IN THE FUTURE WE SHOULD ASK FOR AND RECEIVE CLRNC FROM ATC PRIOR TO PERFORMING ANY WAKE TURB AVOIDANCE/RECOVERY MANEUVER. THE CTLR CONTINUED TO BERATE US; DESPITE OUR ATTEMPTS TO EXPLAIN THE SEVERITY OF OUR ENCOUNTER. HE TOLD US THERE COULD HAVE BEEN A CONFLICT WITH OAKLAND TFC; IF ANY WERE PRESENT (THERE WAS NOT...PLUS; WX/VISIBILITY WAS UNLIMITED). FINALLY; HE SUGGESTED THAT NEXT TIME; IF WE NEEDED TO ESCAPE THE PRECEDING ACFT'S WAKE; THAT WE TURN R. (TOWARD THE VORTEX; WAKE AND EVEN THE OTHER VORTEX OF THAT ACFT.) CORRECTIVE ACTIONS: ENSURE CTLRS ARE BRIEFED IN THE HAZARDS OF WAKE TURB.