I know many people are already careful about this for this very reason but given I slipped up here and had it occur, I feel the need to share what happened so people can learn vicariously from my own mistake.
I've been trading with other users and sharing my dodo code publicly. My biggest problem with dodo codes is that I forget to apply to an entire open-gate session, rather than a single visitor, and that gates do not close themselves automatically when the visitor leaves, meaning I often have this dodo code left open for anyone to come. In general, people are nice on this forum and I trust 99.9% of you all. Or 100% if this person was just a guest on the forums.
Someone found the dodo code I posted publicly and came to visit while I was in my house (which is on the opposite side of the island to my airport). I instantly did not trust this person. They had the word [removed] in their name. I found them in my orchard and flower fields as I was trying to run across the island so I asked them what they were doing. They said they were just visiting. I ask how they found the dodo code, but they didn't answer. They asked me to give them something, to which I refused. They promised me real artwork, to which I refused again, then said they were generally 'sad' so deserved something. I said no. They hadn't done anything bad at this point so I asked them politely to leave rather than kick them. They didn't listen.
Then I realised that they had in fact done something - stolen my peaches. Peaches are not my native fruit, and I only have 1 peach tree so far, meaning I no longer had any peaches to plant for more trees for a few days. If they'd taken some apples (my native fruit), chances are I would not have cared. I am happy to share apples for free as they are in near enough unlimited supply for me, but I am very limited on peaches. They ate two, so still had one in their inventory. I don't know what they were trying to do but they managed to drop the third, so I ended the session quickly, and luckily they left without stealing any of my valuables.
Needless to say, I shan't be posting dodo codes publicly anymore - and let this serve as a message to anyone else who does this currently, because someone is clearly watching the trading post right now looking to visit and cause trouble on your islands.
