It is inconceivable that any jurisdiction would ever call in distant professionals to spite the locals, as we once heard it expressed by an exasperated amateur. It just ISN'T done for a number of very good reasons.
Just because there are local FCC licensed Amateurs doesn't necessarily mean a government will call upon them in an emergency if they haven't been active, trained in and familiar with a RACES or similar communications reserve program.
It is professionalism, whether paid or unpaid. No professional ever responds in mutual aid to do anything other than to support the local needs. That is the true mark of a professional (paid or unpaid), whether law, fire or communications.
Any communications responder who is such an amateur that he/she can't discern the difference between amateurish activity and professional activity shouldn't be responding no matter how well intended. Instead, that person needs to take training and familiarization programs to help understand the mutual aid process.
An ACS/RACES response from a city, county, or State OES in support of another government is due to a request from that government. To respond without a verified official request is the height of amateurish activity, and can have severe consequences except in the most unusual of instances.