1.) They don't know how to use it.
Whether they find it confusing or are simply set in their old-school ways, some simply haven't taken the time to stay up-to-date on the latest technology.

2.) They fear the internet.
With all of the sensationalized news reports of stolen identities, sexual predators, hacking, and viruses, many believe that they are erring on the side of caution by avoiding the internet.

3.) It's intimidating.
Some people are simply intimidated by new technology, including the internet. The idea of using the technical marvels of the internet is far from appealing, so it is avoided altogether.

4.) The internet isn't available.
Even in the United States, there are some places where the internet simply isn't accessible. Furthermore, some of the more rural areas only offer dial-up internet, and many feel that the high price for slow speeds and unreliable connections simply isn't worthwhile.

5.) They don't have a computer.
About one in five American households simply doesn't have a computer. Without a computer, internet use is fairly close to impossible.

6.) It's too expensive.
Many living below the poverty line are constantly struggling just to keep their heads above water. When faced with the choice between having access to food and having access to pictures of pets captioned in humorously poor grammar, the need for food usually wins out.

7.) The internet is too impersonal.
Written letters are more meaningful than email, and nothing compares to the feel of book pages turning under your hands. Some simply prefer the more personal touch of traditional communication methods.

8.) They don't see the purpose.
Just as some people never made the transition to television when it became available, some simply don't see the purpose of the internet and, accordingly, don't use it. With the internet's plethora of time-wasting social media sites, coupled with the hodgepodge of pointless games, they may have a point.

9.) They just physically can't use the internet.
It can literally be impossible for some people with physical impairments or disabilities to access the internet. Thankfully, there have been advances in accessibility technology over the last few years, but the technology can be expensive and difficult to learn and operate.

10.) The internet is the Devil.
Some particularly conservative religious sects exist that believe that playing card games or going to a movie theater can be the first step on the path of evil. The internet is perceived as the Devil's ultimate playground, and is shunned entirely. It might not be too difficult to sympathize, as nearly any innocent-seeming web search can ultimately result in some less-than-pure results.