Answer from somebody who has been blind since she was fairly young:

" Yes, blind people do dream. What they see in their dreams depends on how much they could ever see. If someone has been totally blind since birth, they only have auditory dreams. If someone such as I, has had a measure of sight, then that person dreams with that measure of sight. I still dream as though I can see, colors included. For people I've met since, their faces are just blurs or how I imagine they look. To me, someone like my mother looks forever 30. "

Yes, blind people do have dreams. However, those blind since birth or very early childhood have no visual imagery in their dreams. Instead, they experience a very high percentage of taste, smell, and touch sensations in their dreams.

The breakdown is as follows:

There are no visual images in the dreams of those born without any ability to experience visual imagery in waking life.

Individuals who become blind before the age of five seldom experience visual imagery in their dreams.

Those who become sightless between the ages of five and seven may or may not retain some visual imagery.

Most people who lost their vision after age seven continue to experience at least some visual imagery, although its frequency and clarity often fade with time.

Source:
http://psych.ucsc.edu/dreams/Library/hurovitz_1999a.html
This is a rather scholarly paper and dry reading.

For more information, go to google.com, search on "blind people dream" and you'll get links to many sites about the dreams of the blind.

No. Blind people are quite real.

In addition to what everyone else has already said, you do not have to see something to be able to have dreams. You'd be surprised at how much sound can affect the way you live. I read a study where the teacher had the class watch a scene of a movie without music in the background. Then they watched the same scene again with the music and the students felt like the second version with the music was more realistic and helped them feel the mood. Maybe a blind person has not seen an airplane but I'm sure he probably heard one. Maybe he's heard people talk about what it's like to fly one. Maybe he's listened to a movie and can recognize what a plane going down sounds like.

I "watched" Bill and Ted's Excellent Adventure with a friend who is blind. Yeah, I watched it and he listened. Of course it's not the most enjoyable experience I've ever had because I had to explain everything that was going on when there was no dialogue.

But I'm sure audio greatly influences their dreams. If you ever listen to Opera or a musical the words and music completely tell a story without visuals even being necessary.

just because they are blind does not mean that they do not have an imagination

No. Blind people real, Tarzan. :-)

Yes however but they don't see in there dreams, they feel it, if a blind person were to dream that they got punched in there right arm in the dream they would feel that pain.

It's kind of weird that I'd find this question right after I asked a blind friend about this. She said that in her dreams she doesn't see anything, but just senses that they are there. She says in her dreams she is more aware than she is in real life but can't see anything. After all, everyone both blind and sighted, dream about things they know and have experienced. We just jumble it up when we dream.

They can dream.
My great uncle is in my dreams all the time.
so I guess they can dream and are in dreams.

Their dreams are auditory if they've never seen ANYTHING ever, but heard.
If they haven't been blind from birth, then they dream from what they have seen - the colours and shapes and everything.