Between Legalism and lawlessness are the Christians who receive harsh criticism from both sides. "You're too judgemental!" say the anarchists who believe anything goes. "You're a filthy sinner!" say the Legalists who believe their personal way is the only way out there.
The truth is, God gave us the Scriptures for a reason. Through it, we can determine His will, because He has delivered it to us in written form. We have every right to say anything that the Bible says is sinful is sinful. It's not about being judgemental, it's simply "this is what the Bible says". You don't even necessarily have to agree with it, you simply have to acknowledge that God has more authority than you do.
An excellent example is homosexuality. Far too many Christians these days are supportive of homosexuality, and whether by trying to reinterpret the text or simply deciding that the text is wrong, they're not going to let God tell them otherwise. But these Christians are in the wrong, as much as they insist that those who disagree with homosexuality are too judgemental.
Ironically, those who say these things are, themselves, judging their fellow Christians. "You're too judgemental" is a judgement. But God alone has the right to judge. Christians merely reiterate that judgement. With which set of Christians will God be more pleased? Those who follow and preach His commandments as they are written, or those who deny them? Put it this way, Matthew 5:19 tells us that those who disobey the least of God's commands, and teach men to do the same, will be called least in Heaven, so even if you get to Heaven, God's still going to judge you.
On the other side of Christians who remove things from the Bible are those who add things to the Bible. There are, for example, a growing number of Christians who insist that certain genres of music, particularly rock music, rap music, or reggae music, are sinful. But they're not.
Romans 14 is one of several passages that effectively says anything not explicitly forbidden by the Bible is implicitly allowed by the Lord. Alcohol is not forbidden, therefore it is allowed. Pork is not forbidden, therefore it is allowed. Rock, rap, and reggae are not forbidden, and therefore they are allowed. What gives anyone the right to say they are forbidden when God Himself has not forbidden them? Again, God alone has the right to judge. Speaking from personal experience, all three genres have been especially helpful to me and improved my spiritual life. Will God condemn me because while I find your typical hymn rather unimpressive, I have been drawn out of depression by reggae? Will Jesus deny me before the Father because when I was facing temptation, I used a rock song to kill it? Will He judge my faith to be a fake because when I was a new convert who hadn't yet read the Scriptures, rap music taught me quite a lot about them? Far from it, I will stand before God, because He makes me stand.
Let us be mindful of exactly where we stand as humans. None of us are fit to sit in God's throne. We should judge righteous judgement, reminding our fellow servants of our Master's will, never seeking to usurp or disobey Him. If we are to judge each other, let it not be based on our desire to be leaders, but rather out of love, seeking to help each other obey the judgements that have already been given by God.