I think they might have been messing with you. I totally understand why you'd be freaked, I mean, I would have been too, but people can pull some really stupid pranks sometimes. Try not to worry yourself too much over it. Easier said than done I know, but... Hope everything is okay.
Bikies are gang members that ride motor cycles, although when they're driving cars they are usually nice cars like the ones those guys were in. They pretty much dominate Australia's underworld and there are alot around where i live...
were you in a neighborhood you don't usually go to? i know that when some random wierd looking guy shows up in our neighborhood and looks like he ca't afford to live there, dave makes a big production of eyeballing and documenting their presence. he's lived a pretty rough life and we've lived in some pretty rough neighborhoods. but shit's not about to start happening in a perfectly decent neighborhood while we're here. i once saw this guy driving around and around, back and forth in front of my house looking at my windows. i was home alone, so i took my camera outside, took a buncha pictures of his car while talking to dave on the phone. he disappeared and never showed up again. the next time i had the shotgun ready.
nah i was in my neighbourhood driving home, and it's not a classy neighbourhood either, alot of lower class people live around here.
