I am pretty sure that I would be reviewing all the posts until I get to trust anyone posting from the account.. and that sometimes my own inabilities to sufficiently delegate...   but yeah, I am not really used to using plagiarism tools.. and for sure I would not want posts that are not either original content or adequately citing the source.. so I suppose that should be part of the training process regarding citing sources properly... and in writing my response, I can see where there could end up being a danger because so many folks do like to take short-cuts.. and surely teachers these days have become experts on searching for plagiarism.