When most people think of fencing, they automatically envision permanent, perimeter fencing. And while this is the most common reason why you may need fencing, there are occasions when temporary fencing will be your best bet. For example, you could be engaging in minor construction on your property, and you need to cordon off the area with temporary fencing, or perhaps you need to engage in crowd control for a certain event.
If you're seriously afraid of heights, then no type of protective device between you and the "edge" will appear to be safe. However, in most cases you may trust the design capability of the barrier, and when it comes to home design, you may be more worried about its aesthetic. For example, how can you make sure that a rooftop deck is safe while taking full advantage of the glorious view?