If 500 is the magic number, then so be it. You may consider this isolated but given the tools that we have at our disposal and the example of the Mumbai slum in urban design, there is no longer any real reason to say that overcrowding necessarily leads to violence. Give those people a decent infrastructure and sanitation level and a bit of disposable income for luxuries such as internet connection, without instilling materialism and fear over their functioning humanist outlook and we may begin to see a way forward in a world of increasing population and diminishing resources.
Yes, violence does arouse us at a base level but the portrayals of violence in films are far too sanitized as well as glorified to present a full picture. There are always consequences from violence and it is not always killing that is the most horrific outcome. Taking the example given by the OP, jumping up and down on someone's head might not kill them but could leave them terribly damaged for the rest of their lives.
We have developed ways to release these violent urges in relatively non-violent ways, from sporting competition to online MMO gaming. I have and still do participate in some of these activities and enjoy them very much. I especially enjoyed the PvP in Evony and as long as it is done in good spirit, no-one ever really gets hurt.
Real violence is not cool. If you think it is then you really need to examine your own moral code and find out why you do.



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