Let cooler heads prevail...
Definately get some tags if you can... are they yelling insults too?
I might just be a bunch of bored kids out for some cheap thrills... I remember a story a college professor told us in class once. During the 1920's-30's there was a huge Klan rally in some farmer's field in Southern Wisconsin (Jefferson/Whitewater area)one spring friday night. The Klan was popular in a lot of rural areas at that time - the great depression and various scandals led to its fall from popularity. Acording to the Prof (who was fairly middle of the road) to join the Klan in the 20's it was $20 a year - a sizable amount in those days, usually only the upper and middle upper class could join. After everyone had assembled in the field for their rally, someone had thrown nails all over the only road leading in/out. In the aftermath, there was outrage and prognostication of a huge conspiracy on the part of this group and that (up in the North is was usually the Catholics, Jews to a lesser extent Blacks just because there were relatively few). The general speculation was that it was a bunch of newly graduated high-schoolers out for a thrill, but because it was the upper crust that had their then fragile car tires flattened - everyone involved kept mum...
Just something to keep in mind...