I did some research on the forums and I found out it would be possible for me to share my Macbooks Ethernet Internet via Internet Sharing.

Assuming that my device (iphone) sees the connection being shared it will work and no 3rd party won't know it is my phone surfing: all a 3rd party could see is my macbook. and all it will see is traffic coming from the macbook. and unless they start sniffing every packet they can't tell it comes from a phone.

Is this true?