question about camping with a pittbull

While walking on a rural road I saw two unleashed dobies come running out of a yard, growling and looking very mean. They stopped about 100 feet short of me, barking and snarling as if daring me to take another step. My gut reaction was to yell at them to get the hell away from me. I was frightened. The lady owner came running out and started blaming me for this.. "don't you know what to do around aggressive dogs?"

"No, ma'am, I have never taken dog attack classes." I reported it to local animal control and they admitted they've had trouble at this address before.