Guild Wars 2

Suppose a GS guardian put a symbol of wrath on a cluster of allies under attack by an arrowcart.

Would the player on the arrow cart kill themselves?

No.

15 characters

Used to give dmg to the arrow cart. Making siege practically useless for defenses so they changed that. No neither you nor the siege take dmg.

But there are still skills that assist in defending your team’s siege against enemy siege. Elementalists with a focus in air attunement can use Swirling Winds to prevent incoming siege projectiles from damaging your cats/trebs/etc. Same goes for Sanctuary cast by a Guardian. Reflects just don’t work (at least they don’t damage the siege/operator, anyway.)