The atmosphere is not collegial, and trust is neither automatic nor always warranted. The number of computers on the Internet and the difficulty of configuring them securely means that attackers have more chances of finding a way into systems than they did a decade ago. Along with low-cost Internet access, computers are inexpensive and the price is dropping. This means that more attackers can afford both the computer and the Internet access needed for an attack. Also, there are many more opportunities for computer access.
Some libraries provide free Internet access.
My children s school invites family members to use its computing facilities one evening a week. These Internet access points are a convenience and a helpful service, but they are also an opportunity to commit a crime, and are readily available to anyone so inclined. Means the tools are there, nicely catalogued and ready to go. Motives with so much on the Internet, motives are there. Opportunity there are many, many access points to the Internet.