There were a couple of reasons for these repeated attacks on Pamela. In truth, Pamela begs for parody. The first problem is the epistolary nature of the novel. Pamela is written as a series of letters to her parents. The reader always knows that Pamela must have survived any attack on her because she was able to write the letter. Attempts to get around this problem became ridiculous when Pamela was effectively writing to her parents with one hand while warding off rape with the other. This scene went straight into Shamela.
The second problem is that we only have Pamela's word for everything that happens. In her letters, Pamela tells her parents how the other servants love her, and how one friend in particular says the master actually loves her, and how every one is crying when she is about to leave them, and so on. A cleverer writer than Richardson might have conveyed Pamela's friendliness her without making her seem self-absorbed and therefore scheming. As it is, anyone with an even a slightly suspicious mind can't help thinking, occasionally, that perhaps Pamela is really Shamela, a gold-digger out to entice and entrap Mr Booby into marrying her.
So in this Twitterised version of Pamela there is a follower, Shamela, cynically throwing verbal rotten tomatoes at the actors in the drama.
If you want to read the original Shamela, try here (where Fielding wrote as Conny Keyber) or you can buy it from some bookshops. Sometimes it is included in publications of Joseph Andrews.
