Here is the thing let me say this
I watch Hulu and BBC but I am subscribing to a VPN Service which fools Hulu and BBC iPlayer thinking that I am from US/UK
Is it legal ? - Well I am watching content from Hulu , they have gotten rights to publish their content. Its their problem and not mine. However some may argue that is illegal because I am watching these content out of United States/UK . It falls in the grey area anyway.
Let me put it this way
Assume that there are two of us . You are the content provider , in other words you steal content from other services (say CNN , but you did not get the rights , instead you put a camera in front of your TV which is connected to ASTRO and stream it across internet"). Now suppose I happen to find your stream and I continue to watching it
As far as the legal side is concern , they are not interested in coming after you (aka the people who watch these streams). They would go after the content provider aka the person who hosts it
is it IPTV is illegel ?, internet TV channel is illegel ?