He didn’t even see the perpetrator jump off the airport pier and into the water, only to swim around the fencing and onto the rest of the island.

But a New Horizons summer update that allows players to splash into the ocean unexpectedly left an exploit open for badly behaved visitors.

Should a visitor jump off the airport pier into the ocean, they can simply swim around any barricades.

Fencing is probably the most popular option, but the new airport pier exploit renders it useless, leaving some players worried about scammers on their islands.

New Horizons player G, from the island of turnip4wat, told me he’s active on turnip.exchange, a site where players open their islands to strangers to buy and sell turnips, to share resources, and to trade DIY recipes.

There’s a lot of decorative fencing and hedges already, creating distinct pockets of the island.

G said he’s still going to host people at his island — that most of the community is good.

Another player, Skye, told me he experienced something similar: While hosting a DIY trade on turnip.exchange, someone quietly hopped off the pier and disappeared.

The easy way to deal with suspicious behavior on your island, though, is simply to end the multiplayer session

Another player, MG, told Polygon that people shouldn’t panic, though: There are ways to ensure that your island is safe

Focus on fencing off the high-value areas, she said — like rare flowers or money tree orchards

“But if someone is still concerned, I would suggest they aesthetically incorporate fencing into their beach areas,” MG said

You don’t even have to use fencing, she said: “You could use cute items that happen to block access points