Well I thought it would be safe.

I watched Probably Senpai's video about the ban issue. His points were very good. I thought maybe it is safe to do visits again. I went to check out my trusted friend's valley to look at the decorating they had just done. I only picked up a 3 leaf clover and pixel shard that spawned while I was there. I left, went to open for a visit to my valley and got the first message. During my visit the game crashed. I came back to the game to the mail message. No modding/cheating was done. We were using multiplayer as intended and I got this flag. I don't know how their detection works but they need to adjust it. *note this was not to say that Probably Senpai's video was wrong, I am a fan of his. I only wanted to refer to why I felt safe to do visits again.