Original sentence: In the past, the local derbies versus Schwarz-Weiss Essen were big events, sometimes followed by more than 30,000 fans, but with SWE now in fifth-tier play, they are not taken seriously by  RWE supporters.The club's fiercest rivalry is with Schalke 04, from nearby Gelsenkirchen, with whom they contest the Ruhrderby
Edited sentence: Due to the general improvement in German football, a trip to the Georg-Melches-Stadion in Essen is not as threatening as it once was.However, it is hardly a relaxing day out and sometimes it can be quite intimidating, although the police shows large presence.In the past, the local derbies versus Schwarz-Weiss Essen were big events, sometimes followed by more than 30,000 fans, but with SWE now languishing in fifth-tier play, they are not taken seriously by  RWE supporters.It is advised to exercise caution around the ground and not to wear the colours of the foreign club, at least when travelling alone.It is an event of great interest, even among neutral football fans, and it is also - unfortunately - an occurrence of automatic riots and endless work for the police.The most detested rivals are Schalke 04, resident in the city of Gelsenkirchen, only 15 minutes away from the city of Essen.When RWE is playing Schalke, it is called the "Ruhrderby", named for the nearby River Ruhr