iPhone Glass Scratches

The first 2 weeks I've had my 4S, I went without a case because I'd read numerous accounts about how durable the glass was and that if you were careful, it'd be fine. 

Well, 1 week in, I already had scratches on the front and back having never dropped it and the phone having stayed mostly  in my right pocket. They're hairline scratches but still scratches.

I've since covered both sides with speck's shieldview but I would like to know everyone else's experiences.