So yeah, in certain contexts hacker means someone who breaks into computers. In the context of this site (and MIT culture where the term came from) it means someone who draws on their creativity to make something cool.
Hackers do create things. Sometimes malicious things and sometimes things that offer no real benefit to society, but things all the same. In this definition you have to take the good with the bad.
hack·er
1.a person who uses computers to gain unauthorized access to data. INFORMAL an enthusiastic and skillful computer programmer or user.
There was a time many ages ago when the word "hacker" was reserved only for the most dangerous and reckless breed of computer programmers.
Afaik: From the 1960s to early-80s, it meant someone who creates. From the mid-80s to mid-00s, it meant someone who breaks into systems (driven by media reporting on FBI prosecution of the first network-enabled cyber crimes). From the mid-00s to now, it seems to be turning the corner again (co-mingled with the rise of maker culture).
Hackers are people who create things.
http://www.paulgraham.com/gba.html