Safety on the Transsib ("Firmennyj" trains, Chinese, NKorean car etc)

Sorry to ask this unusual question this time please answer in English.
It's not me is who asking
- I am asking for a VT traveller form the States who is concerned about her safety on trains of the Transsib. I already answered what I could on an other forum, maybe others also can contribute.
Thanks!
(I am not afraid, my wife and kids will scare anyone.
And I was 6 times there already)
It's not me is who asking

Thanks!
(I am not afraid, my wife and kids will scare anyone.
