I agree, and I'm sort of disappointed that Elissa has not stood her ground with Amanda.Jen's penalty was because she intentionally was inhaling turkey burgers when she was on slop, which was breaking a BB rule. Other HG's have had to be a have not for an extra day after accidentally eating a grape (Kevin) and drinking Gatorade (Jeff).
There are no rules in BB about taunting, Amanda can follow Elissa around and say whatever she wants. If she punched Elissa, that would be breaking a rule and she would be penalized for it.
What Amanda is doing is no different than what Dick did to everybody, what Russell did to Ronnie, what Howie did to April, and I'm sure I'm forgetting more. Even bringing family members into it - Howie also talked trash about April's family, and even her dog (didn't he say something about going to kill her dog or something like that?). Pretty sure in season 10 the catty girls talked about Libra's husband and her twin babies. Families frequently get dragged into it, even though we know it's wrong and we don't like it, we have to face that it happens. That's Big Brother. We either deal with it or choose not to watch.