My daughter (11)'s iMessages were chirruping at gone 1am so I went & had a look. What I saw was inappropriate to say the least (homophobic, swearing etc) so I screenshoted them to talk to her about tomorrow. She's not the sender btw, she's a recipient. I've gone back to the chat thread on her phone just now - this is many members of her Y6 class btw - and the offending messages are no longer on the message thread. Does this mean the sender of the messages has deleted them?