Genesis 6:5

And GOD saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.

1. By the time Noah lived mankind's actions and thoughts were predominantly wicked.
2. God is aware of what we're doing.
3. God is aware of what we're thinking and planning.
4. It is common for people to ignore God's commandments and do what they want.