Can you effect the physical world during Astral projection?
No, because there is no such thing as Astral Projection. You
don't have to take my word for it, consider the following thought
experiment:
1. Many people have claimed to be able to astrally project. They
may be good people or bad people, but they've claimed it.
2. If they are good people with this power, we would have heard
the reports of how they helped the President find terrorists by
flying about spiritually through all the caves in Pakistan and
Afghanistan.
3. If on the other hand they are all bad, and thus won't help
find terrorists, then we would have heard complaints from various
corporations about how bad people have "astrally projected"
themselves into their board meetings then sold the secret
information to corporate rivals.
See? The "magic" of logic shows that astral projection cannot
exist.