It depends on what you mean by “fortune tellers”. If you’re meaning these flashy “prophets” like Benny Hinn, then I definitely classify them as heretics. If you simply mean the charismatic movement in general, then yeah, I agree with you.
I am referring to the "prophecy teachers," who unsettle and alarm God's people with wild and extravagant claims. Such as -- "we are now living in the last days," or "the Second Coming is almost upon us!"
This lunatic fringe has done great harm to the people of God, and to the credibility of the Gospel. Other than the general resurrection at the end of history, the Bible is a book of fulfilled prophecy. If someone asserts differently, check your wallet -- he's trying to run a scam on you. He's trying to rob you of something far more precious than money -- namely, the hope of achieving substantial achievements for the glory of God. High achievement in strenuous and influential vocations takes TIME. And lots of it. How many folks will pursue careers as coloratura sopranos, or university professors, if they don't believe, deep down, that they have the necessary time to consecrate to preparing for those demanding vocations?