Jeez, why am I getting the 3rd degree tonight? You can potentially block in 4 or more cars in a parking lot with one way lanes and angled spaces. I can block up to four regular, straight-in parking spaces on one side, if i block half of the first and last spaces.
@Bubblehead I just thought of one apartment complex I deliver to where it is nearly impossible to park anywhere on campus without blocking cars in unless there happen to be three spaces in a row that are open. Even then the cars across the way might have trouble pulling out. And parking on the street isn't an option due to the complex being on a busy street with no parking lane. Short answer, you might have to block a car if the alternative is more hazardous.