Yes, agree with your points. Moderators becomes open and soft target for such users and specifically suspended users. Moderation is not an easy task, they have to take strict decision against some wrong actions. Their words may sound strict at first but what they are conveying is not pointless at all. So, this is what brings all moderators in a risk where they can be directly or indirectly abused in one or more ways,
- From social media profiles
- Their website or blogs
- By editing any stackoverflow post
- By downvoting post (specifically questions)
- ...
In moderator private message it should be common name like Stack Overflow Moderator and even more not keeping it only up to name we can have common moderator profile like CommunityCommunity where all the stuff can be described.