Sometimes as Christians we get caught up in debates about whether certain activities are OK. These debates can be time consuming and unproductive, as one side agues "It's nowhere specifically forbidden in Scripture" and the other side tries to build a case based on implied principles of the Bible.
I've realized there may be a simpler way to look at this issue. Maybe before we ask "What's wrong with _______?" we should ask "Is there anything I am commanded to do that I'm not doing?" The fact we have time in which to pursue debatable activities may be a sign that we're unconsciously neglecting something that is commanded.
Here are just four commands of Scripture that I tend to neglect. Maybe you can think of other examples.
This book of the law shall not depart from your mouth, but you shall meditate on it day and night, so that you may be careful to do according to all that is written in it; for then you will make your way prosperous, and then you will have success. -- Joshua 1:8
[P]ray without ceasing -- 1 Thessalonians 5:17
Go therefore and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit, teaching them to observe all that I commanded you -- Matthew 28:19, 20
Be fruitful and multiply, and fill the earth, and subdue it; and rule over the fish of the sea and over the birds of the sky and over every living thing that moves on the earth. -- Genesis 1:28
If I just did these four commands I think that would pretty well use up any time I had for questionable activities! What do you think?
Quotations are taken from the New American Standard Bible.