I ignored them because I did feel slightly intimidated and I also thought if I say hi, its an invitation for them to come over to me. I didn't feel safe, its not the nicest area either and they said the following
"Omg I hate when girls are like that, what the hell is wrong with her i just said hi excuse me miss how are you doing, "
Don't they ever stop to think how the woman might feel?
It happens often, i don't say hi to random guys in groups when i am by myself