No one is flatly condemning your religion in this thread. Sanctification is both practical and doctrinal, and we are all constantly growing and being pruned. I can only say that I have been where you are. When I first began to read this board, Sabbatarianism appeared to me as soul-killing. I chafed and squirmed against it.
The Superbowl discussions were always particularly unnerving. It just seemed to me to be an unbelievable rigor. Through this board, and the historic resources that it pointed me to, I was persuaded of the importance of keeping the Lord's Day, and of a continuing weekly Sabbath. However, my praxis far lagged behind my doctrinal shift, and still does.
Last year I watched the Super Bowl. This year I won't be watching it, and I can honestly say that I won't miss it. However, I'm not as "into" the NFL, and I understand how it would exercise more of a "pull" over somebody who was an avid follower. Last week, though, I did pass on watching a Mountaineer (WVU) basketball game on Sunday afternoon (which is a passion of mine).
All that to say nothing, I suppose. I have very far to go in honoring the Lord's Day. And I understand your concerns about the internet, and about hypocrisy. I don't feel too bad about reading this particular board, but even that can be more for "entertainment" sometimes and less about learning. However, casual internet use for entertainment probably would be a lesser form of, indeed, watching the Superbowl.
I would imagine most Sabbatarians, especially us younger ones, while we are rigid on the doctrinal truth of the Lord's Day, are actually very candid about our failures to live up to it, since most of us were never raised that way. And I can't say that I've ever seen an old oak in the faith say that they kept it perfectly.
However, as we often tell Arminians, inability to keep a command does not remove the culpability attached to it's violation. So I strive to honor it as best as I can, and always go to bed thinking of a few clear instances where I simply failed to do so.
But who knows? A year from now you might be saying the same things to someone else who is planning to enjoy Superbowl Sunday, while you yourself have grown in your understanding of doctrine. We all have a variety of flaws and stains in a variety of areas. And you are probably right in some areas that I am mistaken on.
I wouldn't take people disagreeing with you (not that you have) personally. As Luther says, Christianity consists of assertions. Certain positions are either right, or they are wrong. We can't both be right. And, if a continuing Lord's Day is true, then I would have to say that watching the Super Bowl is a flat violation of it.
It's not about recreation. It's about the entire country tuning in religiously to a gala spectacle of legitimate athleticism couched in ego, pride, hype, excessive marketing, pop culture, and lust. On the day set aside to honor the eternal God, 75% of the country will be fastened to this abomination, and see it as so self-evidently important that church services will be cancelled without question. All for a game. And if you believe in the Lord's Day, I think its a rather obvious choice whether or not to tune in to this Massive Nationwide Middle-Finger that we give to God's command.
However, I don't fault those who do watch... because many Reformed people just absolutely forget that God deals with people over time. We're not converted into a cappella, exclusive psalmody, papal antichrist Christian magistrate presuppositional covenanted Christians. It's all a process stemming from regeneration, and most of us have been where you are.
Take care.