Is It Safe To Carry A Luxury Bag To School?

I got a L.A.M.B. tote bag last week. The retail price is $575+tax, but since I bid it online, it comes around almost half of the original price.
Surely it is not as luxury as some very expensive line such as LV, chanel, etc. But it is indeed a luxury for me, since I am still a full-time graduate student and the bag costs me a lot.
I got the bag simply because I like it, and this is the first time I spend such money on bag. I went to a forum and met some fans of L.A.M.B. bag. A girl who got the same tote and carry books with it for school said it is not safe to carry such bags at school.
What do you think? I would like to hear advice from you.
Thanks!Is It Safe To Carry A Luxury Bag To School?