Glad to see someone acting upon something suspicious, even if it weren't correct. There are good people.

If it were me, I'd have been amused to learn it was for wasps. I don't like them either.

Life tip: to significantly decrease wasps, fill paper bags with plastic bags, tie off the opening, then hang/mount it (or multiple) in problem areas upside down early in the spring. They look like hives, and it deters wasps from building "too close" to another hive. I have these commercial bags with varied grey lines for this purpose as they're a tad more sturdy against weather and look even more realistic.

It won't completely stop it, but in an eve that got ~6 nests a year, setting it out early knocked it down to 1-2. They liked to go around corners out of sight of the bag, so more bags around corners.