Christ Jesus states in Matt.24:11 "And many false prophets shall rise, and shall deceive many". This is different from Matt.24:5 which are fake-answers to trouble; with a spiritual twist on top. These false ones are all over the place right now - because it is the "generation of Vipers" and their show[literally]. These are a symptom of labor pains spoken of by Christ Jesus.
A true Prophet of the Lord repeats the Truth. A fake prophet comes as if he/she is representing the Lord; but speaks their own words. Christ often referenced people as "hypocrites" which is based from an actor, or play-acting. "Beware of false prophets which come to you in sheep clothing, but inwardly they are ravening wolves"[Matt.7:15].
Centralized govt., the media, and churches are made up of false prophets: including teli-preachers. The Lord states that "He makes Himself known in a vision, and will speak in a dream". A righteous Prophet can also repeat the Word: or discern, the times.
A sign of a false prophet is popularity: it matters, too much! The face-book likes, the polls, popularity contest, and viewership #s. Luke 6:26 Woe unto you when all men shall speak well of you". Salt is suppose to be salty; and the Light is suppose illuminating - which will tick people off.
Today, all have a jack-leg-theory, and a miss-interpreted-Scripture that is a-miss. False-prophets of old were to be put to death[Deut.13:1, 13:3-5, Deut.18:20]. They are here in bunches, but should not be physically harmed: they serve a purpose. The spiritual death of Blind-leaders is - "don't follow them". Rebuke, Resist, or Relocate.