Dear Jewishfeminist02,
Halacha IS right and wrong.
I agree with that statement completely and if you give another example then I may agree with you, but the TV example is flawed. From a technical standpoint it IS assur to leave a TV on for the duration of Shabbos. There are 2 main areas of Shabbos observance, The ‘Zachor’ aspect and the ‘Shamor’ aspect. The ‘Shamor’ aspect deals with the ‘tangible’ rights and wrongs of shabbos (i.e. making a fire and tying a knot). The ‘Zachor’ which means to ‘Remember’ the Shabbos and respect it deals with the ‘abstract’ rights and wrongs of Shabbos which include for example not reading novels on Shabbos and not discussing ‘Sichas Chol’ (weekday topics – sports and Definitely business) This is all brought down Very Clearly in Halacha so let us not waste time debating it. The fact of the matter is that leaving a TV, which although is not part of the 39 melachos, which again are the ‘Shamor’ part, the Torah also says ‘Zachor’ and that means that it is ASSUR to do things that are ‘Uvdah Dechol’ (Weekday Pursuits).
So, a TV, which Clearly falls under that category, is Completely ASSUR Min Hatora contrary to popular belief. Gud Shabbos!