i doubt true latrodectus have become part of our ecology, i think maybe some steatoda grossa could have, and they probably just identified it wrongly, you know what TV programmes are like. I just dont honestly think that anyone with a DWA (who must prove they are good with animals, get references from vets, have their houses checked over, animals living conditions, make sure they are escape-proof, etc) would be irresponsible enough to let more than one get out.