i wouldnt go nuts, but at the same time u dont wanna get caught.
listen to theses guys, check where your alarms are, as well as fire escape if you in buiilding? they may wanna check that, if your building requires window bars, make sure there all good, the faster theses dudes get outta your house the better.
2nd, as long as theres no smell, and no paraphanalia lying around. if the guy looks like hes snooping tell him 2 mind his business, show him the door and tell him to keep it moving.(then box ur boys n bring them 2 a friends house bc hes probly gonna call a cop if its suspicious).
Be smart, Be firm, Good luck..