"He who is without sin among you, let him throw a stone at her first." (John 8:7)
That's often the quote given when someone has to defend himself against accusations of wrongdoing.
I do agree with that quote. It is a direct quotation from Jesus.
I don't doubt that Jesus doesn't condemn us. But people who quote the first part of the Jesus response don't seem to remember the second part of it: "Go and sin no more".
Often times, the quote is used to defend a behaviour that is clearly immoral, but the sinful behaviour is continued. Whereas Jesus commanded us to stop doing it. And that is the thing. We want to escape condemnation but also continue our behaviour. We want to have our cake and eat it too. And so our egos are extremely clever to protect itself, we quote John 8:7 without continuing on to 8:11. The ego is an extremely tough creature to kill.
But it doesn't work that way. Sin is still sin. No doubt the price was paid by the work of the cross but that doesn't mean it gives us a license to sin. It's like a $20000 debt owed to credit card companies that was written off. That doesn't mean we can then start going on a spending spree using our credit cards again.