To ban or not to ban e-cigarettes?

When I first entered university, I did something that, upon recall, I always chuckled at how stupidly innocent it was: I started smoking to show people how "mature" I was, and to show off with my female friends. I was very poor in university, much like all other university students back then. So naturally, I chose one of the cheapest brands, a no-filter straight-up cigarette. We only chose a more expensive type of cigarette on the first day of the new academic year. We did not have any strong reason to do so, besides the dire need to impress the new influx of girls at the school.