Why do so many Christians oppose Gambling?

[Sandpiper]

After reading about various southern evangelicals saying that gulf coast casinos shouldn't be rebuilt, it got me wondering. Why are so many Christians opposed to gambling?

There is no biblical injunction against gambling, no commandment in the Old or New Testament that singles it out.

The only feeble argument I've heard is that it violates the commandment against covetousness, and that Christians are to avoid the love of money.

If that's their argument for gambling being a sin, how do they justify capitalism?

Either way, I don't get where the anti-gambling sentiment comes from.