a couple months ago i bought a nintendo wifi then i returned because of the hassle it gave me ( see complications and questions ), now i'm wondering if i should get it agian so i can battle people on Super Smash Brothers Brawl. I'd like to collect some information first.

Complications and Questions

1. My parents like to unplug the internet from our wall. Is this a problem?

2. My parents think the Wi-Fi can give us viruses. Is this true?

3. Do I worry to much?