It depends where people set the bar of God's laws doesn't it!
When i was a teenager I knew impure thoughts were wrong and feared they would condemn me to hell. I was then truly shocked, when I heard other young people in the church( and children of let's say the stalwarts of the church) casually laughing and joking about such matters.
Some believe as long as you don't get drunk, swear, have extra marital affairs or smoke you virtually have a free pass into heaven. Their sins are minor minor sins so they don't much count.
Some adults excuse what goes on, on the inside as just being human. Others consider it sin.
It's where the individual sets the bar isn't it.
In my view, anything less than perfection is sin. And under the terms of the the NC, I don't see how anyone can claim sins of ignorance, especially on these kinds of websites lol. The Bible has been very well read!