re: Houseflies outside - how to get rid of them?

There's not really many critters in this world that I've been associated with in my environment that disgust me more than the common fly.

Try to have a picnic, BBQ, seafood boil, etc. outside this time of year and they are going to be the party crashers that nobody really wants.

Nothing worse in my mind to be eating a plate of food and looking down seeing flies walking around in the potato salad and knowing full well they have likely been crawling over a dead carcass or pile of shite just moments before.

Absolutely disgusting creatures.