A TV and or computer are not evil – as they are merely an aparatus. Their use can be transfered into bad but at the same time good. It depends on how it is used.
It is all about Choice and Yetzer Tov and Yetzer Horoh. In fact we can say this about everything in life.
We are all human beings with the ‘inbuilt’ choice to choose good or bad. How we use these choices makes us what we are. But we definately are not are judges to judge a fellow man and to make assumptions that if he/she watches tv or has a tv they will not have Oilom Haboh. We do not know what the option was and we do not know what the alternatives were for this person at that time, where they came from and at what stage they are in their life.
The references to a Rav having a tv in his apartment or office – again we are not to pass judgment. There are many unerlying reasons for what rabbonin do and who are we to question? A person saw an unkosher food item on the desk of Rav X. Does this mean he approved of the item and would eat it? No. It means it was there for a reason but one doesn’t know why. Ditto the TV. It may be there for others to watch as oppose to other means of entertainment and places to go. It may be necessary for the Rav to keep abreast of things so he can engage in the relevnt conversations required to a job he may be doing.
A person can not genralise on whether a tv and or computer are good or bad and whether one should have one in one’s home or not. This is all relative to a myriad of situations.