Alice can probably still do a fairly good job of avoiding hunting parties, by deliberately and constantly forecasting on herself (and anyone else she wants to protect) and making some radical change if she sees herself (or other person) going blank for reasons not understood (such as if that person is hanging out around wolves/half-vampires anyway). It would be a security risk to do so, given that a blank Volturi hunting party would not make any different signature than a blank, friendly wolf or half-vampire.

I understand that in canon, Bella is able to shield others as well as herself. Would an Alice being so shielded be able to see wolves/half-vampires? That would be a convenient solution, so probably not.