Question is, was it absolutely IMPOSSIBLE for those players to leave. That is actually very important, because these players were in an open world pvp area, whether on a PVP, RP, or PVE server, were engaged in consensual PVP. If they were absolutely unable to leave, and then if they tried to get those Empire players to stop, and they would not, then they would have a good case for harassment.
But only BW can make that call, as even their policy is somewhat vague. Their policy is so vague, I can make a case, by quoting the relevant areas of policy, that getting jumped by 2 or more Republic players, on the Empire side of the map(Where the Republic has no business being) while in the middle of defending a quest objective from some mobs(part of the quest), is harassment, as they meant to be disruptive, etc blah blah blah.
Corpse camping is nothing new in any MMO that has pvp. Every game has ways around it however. Heck in EQ that involved waiting until that person got bored and left, are calling for help. Since then however, the ways of avoiding corpse camping has improved a lot. But like I said, if those players were utterly unable to leave, such as being able to use their quick travel, because they are killed on spawn, which I am thinking is likely the case, and they attempted to get the offending players to stop, which I am sure is also the case, I would say it was harassment. Of course, they could of just not rezzed, the EMpire players would of gotten bored and left. How it was handled back in the day anwyays.