If those don't yield results, you can contact me with the address and I may be able to retrieve public information on the property owner not 'easily accessible' by the public. I can then forward you the info in case you wish to reach out to the owner and get them to clean and/or repair the property. Or I can reach out to an investor or realtor in my network who will try to reach the owner and purchase the property or assist in selling it (respectively).
I can tell you however that if it's a property that is 'under water' and/or in foreclosure then it will be pretty difficult to get the owner or the foreclosing lender to respond. That's when it pays (as others have responded) to take matters into your own hands (in fact you may wish to do this FIRST). Organize a homeowner's association and/or even a 'vacant house' committee and get the neighbors involved in cleaning and maintaining the property. Good luck and let me know how I can help.
4 Bloomfield Ave
#2. When you see some one in that yard, go introduce yourself. Pictures are a great deterant to loitering.
#3. Wait for someone who is not affected by this house, take care of this for you.
#4. Spend hours and hours fretting about something that you can resolve in minutes.
As Hillary said years ago, "IT takes a community to raise a child."
I would add, "It takes good neighbors to make a community."
Just do what needs to be done. Everyone else will spend their time looking for someone to blame or excuses for their inaction. They don't do that in NJ do they?