As ATNotts pointed out, it was a bit over a year ago, Flash Airlines, a 737 crashing in the Red Sea of Sharm el-Sheikh killing all aboard. The Airline had been banned from some (German and Switzerland I believe) but not all European (French) airspace citing safety related issues.
As a result of the crash came a large, heated discussion regarding the sharing of such findings with other authorities within Europe and the world. It was argued that if the information would had been shared, the accident would have never happened. On the other hand, some airlines argued that this could develop as a means of discriminating against them.
IMHO, a European wide ban of Onur Air is therefore in order. I can understand the feelings of Mr. Bagana, but trust me Sir, that’s easier to take that to explain to the world that one of your aircraft crashed because it just was not safe!