As soon the first thing any soldier/terrorist preparing a position will do - shoot anyhing resembling bats or birds.
Once this tech will become widely adopted by one army or another it will be easy to get hold of for everyone, terrorists or freedom fighters alike.
Re: "Give it a nice feminine voice..."
Here are some suggestions:
"Protection team alert, evidence of anticivil activity in this community. Code; assemble, plan, contain."
"Individual, you are charged with capital malcompliance. Anti-citizen status approved."
"Citizen reminder, inaction is conspiracy report counter behaviour to a civil protection team immediately."
"Citizen notice. Failure to co-operate will result in permanent off-world relocation."
"Anticitizen. You have been judged guilty by civil protection, all units deliver terminal verdict immediately."