Brother, there is a serious flaw in your argument.
You say the Bible doesn't speak specifically against TV, but you say "the principle is there", which I suppose makes it clear to you in your mind that TV watching is a sin. OK.
You cite
Psalm 101:3 as the foundational scripture that lays down that principle: "I will set no wicked thing before mine eyes"
But if you say that
Psalm 101:3 means no TV watching, someone can use the same argument and same scripture against the Internet, and claim "the principle is there" since in their view, the internet contains wickedness, just like TV (
or even more so than TV).
But many of the same arguments you might personally use to say using the Internet is not [necessarily] sinful, are some of the same arguments someone else could use to say that watching TV is not [necessarily] sinful.
Keep in mind, brother , that there are always going to be Apostolics who are more hardcore conservative than you are, and
who can always find something you do and tell you its a sin. When they cant find specific scripture for it, they can quote a bible verse to "prove" to you that "the principle is there".
The fact is, we can always find a scripture that shows that
[insert personal conviction here] is wrong, and that
[insert scripture here] clearly shows in principle that doing so-and-so is wrong. In fact, as you may already know, there are preachers this very day who preach/teach that using the Internet for non-business use is a sin!
You see brother, every one of us has someone to the right of us who can look at our life and tell us we're too liberal for them, that we're semi-backslidden, compromisers, etc.
So maybe its better to leave some things between the individual and God, and not be judgmental about certain things. God does allow for personal conviction on some matters. Paul expounds on this principle very clearly in
1 Cor 8. You may wish to go back and take a look at that and see what Paul was saying there.
I leave you with
Romans 14:4 Who art thou that judgest another man's servant? to his own master he standeth or falleth. Yea, he shall be holden up: for God is able to make him stand.
Peace to you.