I have dealt with cops who likely shouldn't be the police, who instantly want to search the vehicle and think they have the right to ask all kinds of stupid questions, like why do you have a laptop mounted in the vehicle, why do you have so many emergency lights, and radio equipment, and why must you make your vehicle look like an official emergency vehicle, and being former police.... I'll let them play their game until they ask permission to search the vehicle, then out comes "better have a warrant" and start showing them my retired police star, and start showing certificates such as the ham radio and gmrs license, basic and advanced Skywarn certificates, the FEMA ICS 100,200,700,800 certificates, my local ARES/RACES member ID, My CERT ID card, and they usually lose the attitude disfunction and start asking how bad it is going to get and where it may be, and like the belvedere Illinois tornado last spring end up asking me to assist with blocking roads and helping with SAR if need be, and usually end up apologizing for their earlier attitude disfunction.