During the warmer months here in Orlando, I walk around the house and yard about once every two weeks, armed with the long-range spray can. I check all of the roof overhangs and around the electric/utility pipes, etc. These guys will build INSIDE of things, too. In the school portable classroom fields, our phone and data connection "cans" would reveal big nests. And then there are the "ground wasps" that build huge nests underground and livestock, pets and even guys operating digging equipment have fallen into these "pits".
I HAVE on occasion left a smaller nest out back, away from our activity areas. The wasps DO provide a degree of natural pest control - especially with the SPIDER populations. Speaking of that, the wasp will be hovering and searching around the house and will even come up to you for a look-see. They are searching for prey, not out to get you. If you freak-out and immediately start swatting at the wasp, then it will likely react aggressively to your "attack". The time they DO get all

is if you accidentally - or not - hit their nest or get too close after something or someone else has gotten them all riled-up. The best time for inspections and erradications is in the coolest part of the mornings, when the wasps are all on the nest and huddled together. They are pretty cold-sensitive and are much more docile when it's cool out. I've been on patrol for over four years and have never been stung. I get all

when one is hovering close by, checking me for spiders and bugs, but I just stay still. Within seconds he goes on his merry way.
Oh - about allergic reactions and all - it is a good idea to not only keep treatment supplies on-hand - especially in Florida - but to check the EXPIRATION DATES on the items. My

brother-in-law is very allergic and one sting could

"take care" of him. Well, his dad happened to look in the car's glove-box - yep - the anti-sting kit was two years out of date!