Player ships can be scuttled by other players in Trammel. Once a boat is scuttled, regardless of the security settings, it can be boarded by anybody. At that point, the only things the security settings protect is access to the helm, the hold, and the cannons. However, in Felucca, with these same conditions, a boarding crew can board a scuttled ship and take the cannons, and the contents of the hold.
These conditions were established prior to the release, and the Devs made a good point in explaining that. Caveat Emptor!
I will concur that it was bad form to block someone in with multiple ships to scuttle a boat, but it is hardly harrassment and not what I consider "non-consentual" as the player herself was not directly attacked or killed.
I classify this as a hard life lesson in securing your cargo and paying attention to what is around you.