So what can the salad eater do to be safe? Some pathogens can't be washed off. Others can if you scrub, but not if you rinse. If you buy the whole head, pathogens can hide in the core. And if you buy pre-cut bagged salad, how can you wash that? What if you drench the salad in vinegar before eating it, will that kill E. coli O157:H7?
Carry on as you are? You're more likely to get hit by a bus than catch E. Coli from a salad.