They make cool pets, you just have to be very nice to them...
Wikipedia states: Sting The tarantula hawk is relatively docile and rarely stings without provocation. However, the sting, particularly of P. grossa, is among the most painful of any insect, though the intense pain only lasts about three minutes. Commenting on his own experience, Justin O. Schmidt, entomologist and creator of the Schmidt Sting Pain Index, described the pain as "…immediate, excruciating pain that simply shuts down one's ability to do anything, except, perhaps, scream. Mental discipline simply does not work in these situations." In terms of scale, the wasp's sting is rated near the top of the Schmidt index, second only to that of the bullet ant, and is described by Schmidt as "blinding, fierce [and] shockingly electric". Because of their extremely large stingers, very few animals are able to eat them; one of the few animals that can is the roadrunner. Many predatory animals and kayakers avoid these wasps.