Brockton
The group that operates in Brockton is the Metro South Property Owners Association.  We don't know how active this group is.  We are not affiliated with MSPOA.
How to Join MSPOA
They charge $50/yr.  You can sign up on their website.  Currently you can’t get access to MassLandlords.net by joining them.
…or Get Started Today
If you join MassLandlords.net today and decide to join MSPOA later, we’ll refund you $15. That’s 30% off the MassLandlords.net price. Just email us your MSPOA receipt with the words “MSPOA Credit” in the subject.