When you download a software, you get a page to
click I accept Or I do not accept.
Same way when you avail any of the OTHER .services .
Example Cable
TV operators do not allow 2nd TV in same house. ( FREE )
You cannot allow your neighbour to tap the connection.
2.
For Internet also, some ISP's have printed in the smallest FONT possible
TERMs of Usage/Acceptance, which prohibits you from sharing the
Internet connection. Example below:
Policies | Cox Communications
In this country, any agreement or Rule can be interpreted/broken in 1 billion ways!!
Like viewing Pirated Movie DVDs or
music, or downloading from torrent sites/or
Using Illegal copies of
Windows OS and cracked keys for applications.
In plain words, all the above activity is PLAIN THEFT!
If anyone is generous in sharing Internet with others, doubtful, he will allow another
person to share/use his car/scooter/gas connection/ etc.
In Internet usage, there is added element of use of HATE mail/malicious posts
/Terrrorist traffic ( coded or otherwise )
and you will be Held Responsible for the act of others.
The person escapes, as what ever he does, you have authorized him,
and you are responsible.
When you TRUST a person he can cheat/harm you by his acts,
even though not intentional.
If you are afraid of arrest/prosecution/ punishment for misuse by other person/s , :
YES it is illegal.( NOT allowed).