Re: His mistake was living somewhere that something like this is allowed to happen...
"If someone doesn't respond to legal filings, at some point the judicial system has to decide what happens with those filings"
True, but the plaintiff needs to show proof of service. Since this was an ongoing dispute, there is no reason why Zavodnik wouldn't have an address to send a process server, certified letter, etc. He could also send the paperwork to Costello's attorney.
Stranger things have happened. A woman sued for "undue and unjust pain during childbirth" and not only did it get to trial, a jury awarded $6mn. I never heard what happened on appeal.