5. Leeds United

Arguably the most well-known fanbase on the list. The Service Crew of Leeds United F.C. come in at No. 5. Despite a long history of violence and a reputation that spans the globe, their 101 arrests only account for 0.47 percent of the total 21,572 in attendance on their average matchday. It could therefore be argued the “danger” is diluted.

But don’t be fooled into thinking Elland Road is the new Disneyland. Far from it. Sam Casey of the Yorkshire Evening Post reports a dramatic rise in fans arrested compared to last year, “roughly 63 percent more than the 62 arrested in the 2011-12 season.”

This, coupled with their infamous reputation, means this list would not be complete without the The Service Crew of Leeds United F.C.