My regional bank didn't bat an eye when I studied abroad and failed to mention that I was travelling for an extended period. I checked with my parents and they hadn't said anything either (same bank but no account access). 7 months of transactions, ATM withdrawals, and other activity across 7 different countries nearly 4000 miles away from triggered nary a warning.
Fast forward another 6 months and several out of state trips and "large" purchases, I drove down to Florida for spring break. As I went to pay for lunch for my roommate and I, I found out it was declined. Luckily he covered and I called the bank. They decided to cancel my debit card -- on a college student eligible only type of account -- without warning and told me to show up at a branch to get a new one, despite being a thousand miles away from the nearest branch and with less than $20 in cash in my pocket. It took an awful lot of cajoling, not backing down, and pleading cash poverty before I even got to a manager who could "uncancel the card" until I got back to a state with a branch, despite being told for an hour that it wasn't possible to do. When I got home, I found my new debit card but kept using the old one until it was deactivated. It never was, and when I lost that card I activated the "new" card and it worked perfectly.