1. Everyone dreams
Not true. Some people can’t due to the fact they have brain damage or are on medication that inhibit the dreaming state. Some medical conditions cause a lessening of the REM or nREM state (and other dream states).
Almost all people do dream (including blind and deaf people), recall of dreams however is harder for some people. Lifestyle, medication, sleep time, desire to recall and even personality can effect this.
2. People go crazy when they don’t sleep/dream
Yes possible, but very unlikely. Generally go without sleep for long enough and you will go into a coma or be hospitalized and they will force you to sleep. When sleep deprived you will do more risky things and be inhibited. The more sleep deprived, the more likely it is to cause a problem.
Insomnia is a real problem for which a GP or sleep doctor is needed to assist.
3. Animals don’t dream
Completely false, Google scholar “mammalian dream states”. Dolphins, Rats, Dogs and Cats (most dog/cats owner can tell you this), Rabits, Cows, etc. Even Snakes and reptiles have a state their mind enters into when asleep, they do not enter a coma. It can be reasonably assumed almost all animals with a brain and central nervous system dreams. Weather or not this indicated consciousness or if they are aware of dreams is a argument for the ages.
4. Lucid dreaming will make me X
Go mad, be sexier, scared, silly, stupid, etc. Most of these claims are false. Lucid dreaming is completely safe and almost always leads to the dreamer having a awesome nights sleep, nothing more.
5. You can get trapped in dreams
Not true, but you can have a “false awakening” attack were you wake up again and again but are still actually asleep. These dreams are unnervingly real and look and feel real, its often not till you are awake you notice the difference. If you suffer from them, best keep a log of the differences you notice. The movie Groundhog Day reminds me very much of someone having a false awakening attack.
Reoccurring dreams are also an issue, best thing to do is to attempt lucid dreaming and or seek professional advice from a GP or sleep doctor.
6. My dreams tell me the future
Unlikely. I published a post about this here. Generally most claims of dream prediction have turned out to be false. Its possible, but VERY unlikely. Actual credited accounts backed up by multiple independent people are completely nonexistent.
7. I can talk to God/Spirit/Goddess/Jesus/etc. in my dream
This is completely YOUR experience and for you it is truth and for everyone else it is, well you talking to your mind. In reality that god/etc you talked you is really your own subconscious and thats fine, talking to your subconscious is awesome and I am glad you do it, but claiming to anyone but yourself that this is the TRUE WORD OF GOD is likely to get resounding bouts of laughter. Also note you REALLY DONT have to do anything this God/Spirit etc tells you to do, really, make these decisions with your waking mind with evidence and support and counsel of your partner or friends or whoever.
8. I can die while dreaming
Yes you can, but not from dreaming in of itself. Stroke, heart attack, hit by an asteroid, suffocate on your pillow, all possible while dreaming. Its not the dreaming state that kills you though.
9. Waking a sleepwalker is dangerous
Not true, wake that sucker for their safety. People have done crazy things like get in the car, get milk from the shop, cook dinner and leave the stove on while asleep. If you know your a sleepwalker and live alone, use some method to wake yourself, such as a alarm that goes off when you open your bedroom door, a bell tied to your feet, something. Problem sleepwalkers should also consult a GP or sleep doctor.
10. Dreams are inspirational
Yes, yes they are.