Let me first begin by saying the post says "active" -- which implies that one is "willingly" walking in sin -- leaders should do their best to ensure that those whom they assume some responsibility over, have a walk worthy of their calling. Open and unconfessed sin should never be allowed to go without confronting. And that goes for any sin - not just homosexuality.
As far as Christians not having the right to judge one another -- or -- he who is without sin, cast the first stone -- let's keep these in context. We, as Christians, do a great disservice to the body of Christ by ignoring open sin/misconduct. Whatever happened to the scriptures that say, "All scripture is given by inspiration of God, and is profitable, for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work"
Don't dismiss/ignor open sin -- confront it. "Brethren, if anyone among you wanders from the truth, and someone turns him back, let him know that he who turns a sinner from the error of his way will save a soul from death and cover a multitude of sins" -- "because the soul that sins shall surely die". Speak the truth in love. "Brethren, if a man is overtaken in ANY trespass, you who are spiritual restore such a one in a spirit of gentleness, considering yourself lest you also be tempted." "An open rebuke is better than love carefully concealed."
I read through all of the replies to this post -- and I saw a lot of people refer to the large amount of sin in the church, and stated that was a good reason not to sit someone down from ministry. Becasue the reasoning was, if we sit one sinner down, we sit them all down -- then we have no one left to minister. This logic is out of balance. It's this kind of mind-set that has brought the church to the state that it is now. We need to work on cleaning up the church, eliminate the compromise. We are supposed to be growing up -- not maintaining in our sin. Leadership needs to step up to the plate and be accountable and responsible -- for they are gifted for the "equipping of the saints for the work of the ministry, for the edifying of the body of Christ". If they refuse, then they themselves should step down. Sin cannot be left alone...because "A little leaven will leaven the whole lump" -- this passage of scripture actually deals with sexual immorality in the church!
As far as the leadership themselves walking in sin -- bad on them. There are some specific qualifications for the primary leaders in the church (see 1 Timothy 3). If they can't walk blameless and worthy before God, maybe you need to consider another place to fellowship.
Bottom line -- we are to be vessels of honor, not dishonor. "But in a great house there are not only vessels of gold and silver, but also of wood and clay, some for honor and some for dishonor. Therefore if anyone cleanses himself from the latter, he will be a vessel for honor, sanctified and useful for the Master, prepared for every good work." So, if one refuses to cleanse themself from sin -- they shouldn't even consider themselves USEFUL for the Master. "Be ye holy for I am holy!"