How we cite our quotes: All quotations are from A Clockwork Orange.
Quote #1
MRS. ALEXANDER: I'm sorry but we don't usually let strangers in in the middle of the...
Most people live in an area where they lock their doors and don't let people in. But the reactions to Alex banging on the door show us how dangerous society is in this world. Even when he says his friend his dying, people are reluctant to let him in.
Quote #2
ALEX: I suppose you can't be blamed for being suspicious with so many scoundrels and rouges of the night about.
Alex is talking about himself, and other gangs like his, here. Their crimes sow distrust in the community, and make it a more dangerous place.
Quote #3
ALEX: It had not been edifying, indeed not, being in this hell hole and human zoo for two years now, being kicked and tolchocked by brutal warders, and meeting leering criminals and perverts ready to dribble all over a luscious young malchick like your story-teller.
Even though Alex is a criminal, he seems to think he is different from the other people in prison. Alex has killed and raped people, so he is a criminal and a pervert just like they are.