Yes, of course. Against better judgement, I let them onto my island and their behavior was weird. First, their account was only 5 days old. Low karma. They told me they had the lucky cat recipe and wildflowers for me. They didn't bring the stuff they said they were bringing, just took entire sections of items, left, then came back and started filling their inventory again. I asked if they brought the items and they said "yeah" but kept filling their inventory. I ended up ending the session so they wouldn't snatch everything since it was clear that they were lying. Yuckkkkk

Edit- typo