Places in Riyadh with Bad Reputations

I went to the Chamber of Commerce 3 weeks ago to process some visit visa, but because it was prayer time, I had to go grab some pizza in Hara area. I was wearing a white hat given by a friend from the US. When I was on my way back to the Chamber of Commerce, a teenager on bicycle grabbed the hat I was wearing. I later found out from a colleague to avoid that area (Hara)- because it is known to be filled with street gangsters who would grab laptops, mobile phones, etc. Taxi/Cab drivers would also agree that this area have lots of "alibabas".

My friend from the UK also mentioned an area near Bin Sulaiman Centre to also have a bad reputation.

Charging it on experience, are there any places you would say, or at least heard of, to be of a similar story so other expats could avoid or at least be careful of- in Riyadh?