Searching for Clarification

[AexDestroy]

Just wanted to seek some clarification regarding this line of the rules
"as long as you are able to engage the mobs very shortly after they are spawned."

Couple days ago, we mobilized a raid force to do FG's.
Theres someone in zone calling out "FGs Camped", however theres simply not even enough people in zone for FGs to be "camped" imo. We mobilize anyway to come check it out, and on our way there, these 2 people who were at the camp, a necro and a cleric, pull 1 fg. It takes them about 10 minutes till kill each mob if not longer.

We're sitting there with 12+ people ready to take FGs, but we're not trying to be rude and just leapfrog someone. But at the same time, how can you claim FGs as being camped, when its obviously going to take you 3+ hours to clear these mobs?

So here it is:

Can you claim FG's as camped, if you do not have the ability to kill them as theyre spawning in? And is it against the rules for a raid force which is present, to move passed 2 people who are "holding a camp" in this manner?