How about a drone event?
What if we had a drone event, where every time we move to a new portal we have a link to the last portal behind us? The link gets longer every time you cross another agents link or string of links; and it makes the agent who’s link you crossed start over from the portal nearest to them. You’d have to plan your moves with intel helper. But, it would sort of be like a slow motion, POI hopping slither io. But, you could also try to trap other agents with fields and links, or try to herd them into a trap.