What a great response. I guess I can then say that I am prepared for Barcelona, as I've been to Madrid and have spent quite some time in Malaga on the larios street - it did feel safe to me back then and nothing happened, although, I did use precaution as always.
I think some people misunderstood me for someone who is on their first trip.
In Morocco and Southern part of Spain I took an old canon film camera with me - did the job, made me look less attractive for the gangs. But plenty of useful advice both on traveling as a tourist and on the topic of bags as well.
Thanks again, everyone!
Anytime. Ramblas in Barcelona is the area to look out. And whenever you're walking around with luggage. The moment you put it down, they're coming for you. Several of my colleagues have been robbed of their luggage at the airport when someone bumped into them. The moment they put down their suitcase to help the poor sod out, it's gone. I usually only just carry my camera on a strap acros my shoulder. No real need for bags when you're in the city and the weather is good anyway.