Guild Wars 2

Does one have to be level 80 to participate in WvW? Or is there stat scaling?

In essence, will I be slaughtered if I participated in WvW with a level 25 Engineer? Or a level 25 anything?

There is scaling depending on your character’s current gear level. I.E. a lvl 25 in lvl 25 greens will be equal to an 80 in 80 greens, but a lvl 25 in 20 blues will be much weaker.