Im relatively new to LOL and lately have been playing Blitzcrank for a bit, mastery 4. Today I had a game where the ADC was constantly yelling ks at me. I honestly dont know why. First time the opposing adc flashed after a fight, and I grabbed him right from his flash and hit him with E and he died. ks!. After that I simply grab the adc when I can, and usually combo Q/E/R or W/Q/E/R. Sometimes the enemy ADC dies to my combo, and again I get accused of ks.
Is there some etiquette to this? Am I supposed to just stand there while my adc tries to kill the other adc? What if he fails? Then we're both dead. Seems risky to me.