Well Please visit this blog of Manu Sharma. https://orangehues.com/blog/2007/03/conspiracy-called-tata-sky.html. He was a Tata Sky User and he has given why Tata Sky SHOULD NOT BE TAKEN/USED. You can read the text below in the blog.A fact about Tata Sky.
In North Delhi, there have been reports that NDPL, also a Tata company, is using force to remove cable
connections from NDPL electricity poles causing disruption in the cable infrastructure and forcing cable TV subscribers in 800, 000 homes to upgrade to Tata Sky.
How do we protest? (Please read the blog) Do not purchase their service. If you must, then refuse to sign the contract and demand they respect your rights. Flood their customer care centre asking them questions about the three issues: ownership, privacy and restrictions.
Tell others to avoid Tata Sky. At least until they revise their terms and change restrictive policies. Another thing to remember is that there are other DTH players like Reliance, Airtel and new technologies such as IPTV that are on the horizon. Please do not get fooled!