I don't think so. First of all, people who have truly given their life to the Lord will bring their lives into subjection to God. For example, my Bible does not take fornication and pre-maritial sex lightly and takes an uncompromising position: (I rushed this, but I can back up everything I'm saying by scripture and verse if requested).
1) Your body is the temple of the Holy Spirit -- if you have casual sex you are effectively joining the Temple of God to the temple of Baal as your spirit becomes one.
2) A Christian is to present his body as a living sacrifice unto God.
3) Let not fornication be named ONCE among you as becometh saints (Ephesians).
4) It's good for a man not to touch a woman (Corinthians)
5) A hoe is like a deep ditch (proverbs) -- talks about older married women seducing yonger men or literal hoes.
6) The marriage bed is honourable to all, but hoemongers and adulters will God judge.
7) Do not eat with a fornicator. (should be disfellowshiped from the church if their fornication or sins are known) (New testament)
8) Ultimately, if a professing or born-again Christian, habitually commits these types of sins without real repentance, they are going to hell (Galatians 6), irrespective of what they are professing.
If you think the Bible is taking this lightly -- I don't think so. Believe me, I was looking for a way out to sin -- there is no loophole anywhere in scripture. Back in 2006, and even today, I was looking for scriptural justification or loopholes to do something, and I could not find anything.
This is definately not an excuse -- it's a direction. Getting laid and fornication is the devil's path and road, everybody is following it because that's where the world is heading. However, Jesus leads into paths of righteousness for His name's sake. (Psalm 23). Jesus path is narrow and straight -- few people follow it. We are called to a life of purity, not corruption.
Find me any point of scripture, especially in the new testament, where there is any light stand where it says that "you shouldn't do it, but if you mess up God will understand". It says more like "Hazard, do not touch the electric wire or you'll get shocked" in it's treatment of fornication.
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What I will agree with is that there is a pseudo-form of Christianity going around where God is viewed as a loving forgiving God that is essentially a big nice guy pushover where you can sin and get away with it, and that people have a license to sin and ask God for forgiveness afterwards. For example, I believe there is a poster who is a drummer in a church, and he's seducing the girls in the church. Bad example of how things are supposed to be.
Phineas and Hophnie did that (seduce Jews in the old temple where they were priests) -- in the book of 1 Samuel, and guess what -- Israel was defeated by the Philistineans -- the Ark of the Covenant did not defend them when those in authority were playing games with God.
However the point that Jesus came was to deliver people from their sins -- when you are delivered it has no control over you. In a sence, fornicators are sex-addicts or have an addiction -- because their passions control them.
There is no weak stand here.