Another shit thing about this law is, I think it's going to be impossible to get this law struck down in court, no matter how unconstitutional, because of prudential rules around the way cases are adjudicated. At least, unless MA courts get really stupid in practice about applying the law and refuse to fix their mistakes, leaving an opening for fed courts to strike them down.
Here's the scenarios as I see them:
1) Average Joe doesn't like this law, sues right after it passes in state or fed court ---> Joe doesn't have standing because no ERPO against him
2) Wife takes out patently frivolous ERPO --> District Court rubber stamps, issues --> Husband appeals to MA Appeals Court, claims law is unconstitutional --> MA Appeals Court practices constitutional avoidance, overturns frivolous ERPO on as-applied basis, constitutional challenge mooted
3) Wife takes out legitimate ERPO against obviously dangerous person --> District Court issues --> Husband appeals to MA Appeals Court, claims law is unconstitutional --> poor test case, MA Appeals Court practices constitutional avoidance, says standard of proof and "risk" criteria is irrelevant because order would pass scrutiny even if the law used "clear and convincing" standard and "significant risk" criteria, case dismissed
4) Wife takes out patently frivious ERPO --> District Court rubber stamps, issues --> Husband tries to sue directly in Fed court --> Case dismissed, husband must exhaust state appeals before asking the feds for help.
5) Wife takes out patently frivious ERPO --> District Court rubber stamps, issues --> Husband appeals to MA Appeals Court, claims law is unconstitutional --> MA Appeals Court rubber stamps, SJC doesn't take case --> Husband sues in fed court --> ERPO expires and isn't renewed, case mooted before it's heard
Basically, once the courts fix your particular problem, they don't care that the law is unconstitutional and that you had to spend lots of money to get it fixed. In other cases, the person is a bad test case because the order has merit, so they sidestep constitutionality. If the order expires before adjudication, case mooted.
Comm2a's perspective would be interesting; I think they run into this problem with challenging LTC denials. The state can put together a Rube Goldberg machine that you have to pour money into to get justice, but as long as you get it, you can't challenge the law.