[Hardware]

For years when I was growing up our home phone number was one digit off from a supermarket on the same street.

We'd go through periods where we'd get a couple of calls a night asking what time the store closed, or what was on special. After a while we stopped being polite and telling them they had a wrong number - we'd start giving completely bogus info on the supermarket - Yeah, we're open 'til 1:00 a.m. (they closed at 11). Yeah buy one bottle of pop and get two more for free, (not likely)