If it needs to be said let Charles Spurgeon say it. Spurgeon lays out the problem with those that claim revelation from the Spirit of God.
Dear Brothers and Sisters, honor the Spirit of God as you would honor Jesus Christ if He were present! If Jesus Christ not there! Do not ignore the Presence of the Holy Spirit in your soul! I beseech you, do not live as if you had not heard whether there were a Holy Spirit. To Him pay your constant adorations. Reverence the august Guest who has been pleased to make your body His sacred abode. Love Him, obey Him, worship Him! Take care never to impute the vain imaginings of your fancy to Him. I have seen the Spirit of God shamefully dishonored by persons—I hope they were insane—who have said that they have had this and that revealed to them. There has not, for some years, passed over my head a single week in which I have not been pestered with the revelations of hypocrites or maniacs. Semi-lunatics are very fond of coming with messages from the Lord to me and it may save them some trouble if I tell them once and for all that I will have none of their stupid messages. When my Lord and Master has any message to me He knows where I am and He will send it to me direct, and not by mad-caps! Never dream that events are revealed to you by Heaven, or you may come to be like those idiots who dare impute their blatant follies to the Holy Spirit. If you feel your tongue itch to talk nonsense, trace it to the devil, not to the Spirit of God! Whatever is to be revealed by the Spirit to any of us is in the Word of God already—He adds nothing to the Bible, and never will. Let persons who have revelations of this, that, and the other, go to bed and wake up in their senses. I only wish they would follow the advice and no longer insult the Holy Spirit by laying their nonsense at His door.