In most countries, including the USA, it is prohibitively difficult to completely avoid committing crimes. For example, you commit a crime whenever you:

• Drive over the speed limit
• Sing "Happy Birthday" to someone
• Watch a movie at home with friends (depending on the media)
• Make off-color jokes in public
• Drink alcohol (depending on location)
• Post certain kinds of jokes on Twitter
• Create software of almost any kind

Most of the laws that define such actions as crimes are rarely enforced here in the USA -- until you happen to draw an attention of some moderately powerful person or entity, at which point the enforcement kicks in. However, it would be difficult (though not, I suppose, impossible) to lead a normal life without committing any such minor crimes.