Please help me understand...

So I usually play healers, everytime in I am HFP, a selection of rogues will rez camp, I just had one do it 6 times tonight.

However, as someone who played PVP retail, I never came across this in any expansion on Oceanic servers... not even in 'Gank-lethorn Vale'..

Please help me understand the mindset of these players?

The same one you obviously already know by your comment about the Vale, just applied to a different location.

^this.
Here is a solution:
Open chat
/join global
ask for help
???
Profit

You are low hanging fruit, change zone and problem goes away most times, not entierly but will get a better experience.