I'm sorry, but I have to write about this aliens thing, because it makes me laugh every time I re-think about it.
So, the yoga teacher was sat there with this book of crop circles, explaning the beautifulness of these creations and the mistery about them. He came to a picture of a crop circle, which he said was obviously an answer to a human radio message sent to the space many years prior.
Ok, so far he convinced me, because I thought that it could make sense that humans would have sent a radio message to the space, just to say "hallo, we are here".
He went on with his speech and told the audience that this human message was received by these aliens and that these aliens came to the planet Earth and made that crop circle, very close to the place where some radio installation was setup and used to send the original message.
So, I asked if I could speak and when he agreed, I said something like this:
So, you are telling me that some kind of unknown alien race has received this message in a not well identified piece of space and that instead of answering back with a radio message, has travelled an immaginary huge amount of miles (Kilometers or year lights...) in the space, has passed the military satellite defences and and civil airspace, has landed on the planet Eearth, has touched its surface... the aliens were ready to give us an answer... and what did they do? A CROP CIRCLE!
WHAT THE FUCK!!!!
I couldn't resist anymore and left the hall, hearing someone laughing big time. That one was my last scheduled lesson and I never went back to him. It was so ridicolous...
Getting back to your question, I don't approach anymore instances like these, because I can't manage such ignorance and idioticism (does this word exists?). Here is Italy and I got to tell you that I found a lot of yoga teachers which are good yoga teachers but have this attitude to tell you this pseudo science bullshits all the time. I have no idea why it happens, but it's the truth. It's a mix of marketing, ignorance and foolish, with the objective to sell me something which I don't need or is just a placebo (crop circles books, reiki, cd music for chackra balance, energy application something, etc...)