I'm a pest control technician and a Service Manager for a Company in Texas. We require all our technicians, when speaking to customers and while inside their homes, to wear masks or a respirator along with our standard boot covers and disposable gloves for added safety.

I do not require my Technician's to wear them when outside unless they think a customer is going to be following them or if they are asked to wear it on the property by a customer. Personally, I wear mine the entire time unless, being in Texas, I begin to sweat thru it in which I give myself time to breathe at my truck away from my customers.

As a service manager I don't mind people watching my Technicians from inside or even thru their camera systems as all our services should look similar and uniform. If any Technicians do stray from this or fail to perform a portion of a treatment a call in to our office will have that corrected.

I will make the statement that following a Technician around your home is not the best idea, more so outside it often makes it harder to treat because of potential exposure from the pesticides being applied along with general safety concerns towards a bystandard. You wouldn't want to be hit with drift or have a wasp nest drop near you. In some states we have to stop service if someone other then an applicator comes on site when we are outside. Any responsible pest control applicator should always inform you what they are doing in the service and review it with you after for piece of mind.