On the Destruction side of the lake, this is the opposite: in the most popular PQ there, someone being RvR flagged is a rarity, as the FM arrival point isn't inside the lake.
There are a few Destruction players who have been taking advantage of this and constantly return to the Eataine Order PQ, unflagged so they can't be attacked, and wait for an Order player to be vulnerable such as being far from the others, or attacked by a lot of NPCs; often they wait for the stage 3 with the champion and hero bosses - and then attack. It seems that this is even getting slowly more popular among Destruction players.
Even if these Destruction players are easily defeated due to numbers, it's pretty hard to concentrate on the PQ with them breathing down your neck, and it gets even worse when there are only a handful of Order players there: it can even result in a failed PQ.
Would it be possible to adjust the Eataine Open RvR area size not to include the Flight Master arrival point? That is the source of all of this after all, and I do not think the warcamp's layout warrants the current situation:
The game engine RvR area begins near the top of those stairs where the character is. The flight master is below, on the bridge's level. But the camp guard NPCs are positioned near the bridge, which is a pretty long one, and the actual RvR lake begins beyond it. I think it would be safe to move the border of the lake to somewhere the middle of that bridge, or at least the warcamp side of the bridge, rather than the stairs and more importantly, the Flight Master arrival point, without risking any exploit potential.
