Many countries have closed the “crowded bus loophole”:
In Brazil, where buses are the most common mode of commuting for approximately 21.4% of the population, overcrowding creates an environment where these incidents are frequently reported. The "encoxada" often occurs during peak travel hours when crowded conditions allow the perpetrator to blend into the mass of passengers, making the act difficult to identify for bystanders. Legal and Social Framework encoxada bus
However, if you are interested in a feature story about the broader issue of public safety on transportation, I can draft an article focusing on: Many countries have closed the “crowded bus loophole”: