I got stopped once coming home from the Uni Library at about 11pm. I remember I had a big assignment to do at the time. I had my hoodie on as I was cold so when they wanted to talk to me I just took my hoodie off & was happy to talk. They just said do you live around here & I was like yeah my house is just a few minutes walk away. They're just doing a job, as long as they're nice & polite about it I don't see the issue.