@ Skyhorse and Purplebuzz - thanks for chiming in!
A little about me - I don't ride (rode dirtbikes when I was a kid, I'm still trying to talk my hubby into cruisers for our retirement), I live in SoCal, I plan software conference and love my grandkids and my dog. Nothing very exciting to tell... I'm just someone who wants to live in my home in relative peace and do my thing - and I want the same thing for everyone else.
This IS something that should be settled with a respectful chat and a handshake! I absolutely agree - and we've exhausted efforts in that regard. We've tried - many times - to have calm, courteous and respectful discussions. It's not just me having issues... it's most of the neighbors for 6-7 houses down the street on each side. We aren't a bunch of uptight ninnies, we are a very live and let live group of folks. NO ONE is trying to run these folks out of town, and we appreciate that they love their friends and family and pay their rent on time (and generally seem to take care of the property - or at least the property management company). Because they position themselves as a 1% MC (but they do seem rather harmless -- more Sons of Suburbia than Sons of Anarchy) a number of neighbors are afraid to approach them directly - but both my husband and I have tried everything from Hey Let's Have a Beer to Dude, you REALLY need to dial it down.. and nothing. All they really need to do is police themselves a little, use a little common sense/courtesy and probably meet up elsewhere (and so many clubs do this, it's just not unusual).
We don't do this lightly, and I've never in the years I've lived here seen the neighbors this unified in frustration and this ready to blow. Something needs to change before it gets ugly - it's just going to take one beer too many and one dumb comment from someone for this situation to get very bad, very quickly. Our neighbors are cool people in general - but you know how people (and chickens) can get when they have a common enemy, they'll peck them to death given a chance. I don't want this to be a witch hunt or a harassment of these folks, but they've not left us much to work with.
As far as crimes:
Trespass and mischief (club motorcycles being ridden over neighbors lawns and down public sidewalks)
Noise violations (California has very specific laws governing db levels of street bikes - most vehicles, for that matter)
Domestic disturbance/ violence (way beyond marital tiffs, and it's pretty regular)
Drunk in public, on public throughways
Urinating in public
Illegal parking
Racial threats/harassment
HOA violations (specific to our HOA only):
Parking violations - you have to park at least one vehicle in the garage, one in your driveway and not block anyone's driveways.
Motorcycle storage violations (resident bikes must be parked out of sight when not in operation - yeah, I think this one is kind of stupid, too)
Public meetings - in general regular adult meetings are not allowed (Boy Scouts and Girl Scout stuff is cool - but not say... music rehearsals, adult clubs, etc. This one cuts both ways - my neighbor has a Bible study group that meets each week, but he came to the neighbors, asked if it was cool and we all ended up offering the use of our driveways for parking. OTOH - the guy who wanted his rock band to practice each Tuesday... no. Lots of gray area on this one but in general if you're creating a hassle for the neighbors, you can't do it.
Noise rules (the usual -before 7am and after 10p, you need to be relatively quiet according to common sense - and a general noise rule about habitual/repetitive excessive noise)
Littering/maintenance (yep - I get to clean up cigarettes, vomit and trash after their parties when club members park in front of my house. Yay, me.)
Excessive residents (3 people or so on the lease - there's got to be 6-7 living there)
In tract traffic violations (speeding, blocking, safety)