Wow, there is a lot of very good insights about Tarot in this thread!
I read Tarot for several years,
until I got to a point where I really did not need them anymore as they are just a tool.
I still do use them on occasion, but my deck was destroyed after 13 years worth of use.
I have never gotten another deck that felt "special" to me, and as anyone who reads Tarot knows, your deck is YOUR deck. Once it is tuned into your
vibrations, it becomes almost magical.
One of these days I will go to a store somewhere and get all touchy feely with their tarot decks until I find the right one.
A lot of people have misconceptions of what Tarot really is. You can use them for "fortune telling", and in the right hands they work very well,
however, that IS NOT what Tarot is for.
Tarot is a spiritual journey. It begins with card #0, The fool, who is stepping off into the unknown and beginning his spiritual journey, and ends
with # XXI The World. All of these cards are the journey of the mystic.
The idea is to start with # 0 The fool,
and to meditate on this card, its meaning and symbols, and then after a period of time you go to card # I, and meditate on that card, all the way
through card # 21 The World.
In studying such information, you begin to lift the curtain between worlds as is explained in card # 2, The High Priestess.
The lessons of the Tarot are stored in the sub-conscious mind and as one begins to open their sub-conscious up spiritually, the super-conscious mind
begins to filter through as well.
At least this is how it began to work for me.
Dangerous?
It depends on what your belief system is.
If truly used the way they are intended, and if you get the meanings, symbols, and sub-conscious messages, I see nothing dangerous at all, only
self-exploration on a mystical level.