FOSS gamedev and creative worlds

I was playing on Xanandu server when another player dropped several books. When I opened the book https://i.imgur.com/oPJtgS3.jpg it contained 11 pages of what appeared to be java code. The other players and I began to lag, so I logged out, ran a virus scan, check firewall log ect.. found nothing. I contacted the sever admin TenPlus1 and expressed my concern and gave him/her the location of the book, no response other than finding my account banned the next day. I was unable to get any answer from mods or the server admin in reference to the suspicious book. My question and concern is if it's possible for a skiddie to add their code to minecraft items and use as a exploit, do devs audit the code of mods? I'm not a programmer or very tech savvy, but the entire situation seems very odd to me. I run the 0.4.13 version ,no mods added by me on client side, and have had no other glitches other than when I opened this book. Thanks

These are just hoax books made to worry players on server, they cannot harm either the server or the players machine since text is read only and does nothing else.

Don't know TenPlus1, it seems more like spam to make you and the server look bad...

I wouldn't be surprised...

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