Below is the General Law of MASSACHUSETTS:
http://www.mass.gov/legis/laws/mgl /
MASSACHUSETTS law on Civil Arrest (Permitted only if the Debtor plans to leave the state and other means of collecting on the debt is NOT possible):
http://www.mass.gov/legis/laws/mgl/224-6.HTM Since the statute clearly governs someone who leaves the state (and you say you do so daily) the above statute may apply. Again I recommend you see a lawyer for a Massachusetts or Rhode Island lawyer will know much better than I do HOW this stature works. I suspect it is retained for high income debtors NOT low Income Debtors but see a local lawyer to be sure.
Exemption from Attachments in Massachusetts:
http://www.mass.gov/legis/laws/mgl/235-34.HTM These are better than Pa (Which excludes only $300 in Assets), but I liked the exemption for "Fourth, Two cows, twelve sheep, two swine and four tons of hay."
This is Typical of such Exemption statutes, old laws passed Centuries ago, but added to since than (For Example "Sixteenth, An automobile necessary for personal transportation or to secure or maintain employment, not exceeding seven hundred dollars in value.")