Neighbor who sells drugs

In one expat group of Barcelona one woman asked help what to do with the issue of neighbor selling drugs. In this case the neighbour is selling heavier drugs like cocaine. Drug selling neighbor naturally means shady visitors in your building which can cause trouble. The woman was thinking to report the neighbor to the police but the experienced expats in the group advised her not to report to the police as it can make her a target of criminals. It was clearly advised to just try to ignore the issue because you do not want end up in black list of criminals. According to a Spanish news article assasination in Spain costs from 500 to 5000 euros. It seems that getting someone killed in Spain is pretty cheap. Some expats were also saying that such drug dealers have likely connections to the police officers who are corrupted.