Every time I consider it - I research and just say no. I have been tempted to try the natural version though especially with all the calls for the fact that mosquitoes will worse than usual this summer. We used to live in Columbia Heights - I think it's impossible to control there because you are so close together.
Here's one article from Huffington Post which yes is very liberal
http://www.huffingtonpost.com/2012/06/26/private-pest-control-toxic-chemicals_n_1623966.html
Excerpt below
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The two pesticides are synthetic forms of molecules created naturally by chrysanthemums, a point the company spotlights in its coloring book. Both are also registered with the U.S. Environmental Protection Agency. However, the agency labels bifenthrin as a possible human carcinogen and is currently reviewing both chemicals due to suspicions that they could cause allergic reactions and disrupt the endocrine system, said John Wargo, an environmental health professor at Yale University.
The latter is of particular concern to Wargo. Chemicals that mimic human hormones can scramble the body’s natural signals, potentially leading to developmental disorders, sexual problems and obesity, among other health issues, he said. Recent research suggests harmful effects could even result from tiny doses.
“This is especially worrisome for pregnant women and young children during rapid periods of growth and development,” said Wargo, highlighting the danger of the persistence and reapplication of the pesticides in people’s yards.
The undisclosed ingredients that are added to help Mosquito Squad’s pesticides stick to foliage could also be harmful to people’s nervous and respiratory systems, Wargo said. What’s more, each chemical doesn’t necessarily act alone; the pair of pesticides could interact to cause additional harm. And exposures accumulate: The average person is exposed to multiple pesticides every day via food residues, indoor pesticide products and outdoor products that end up getting tracked inside, he said.
Critics also question whether pesticide sprays actually succeed in killing their intended targets, and whether they protect people from contracting bug-borne diseases.
Biologists at Cornell University point out that targeting mosquitoes with sprays only results in “temporary control” and “should only be considered as a last resort.”
“I think at best they’re somewhat effective,” said Lee Corte-Real, director of crop and pest services for the Massachusetts Department of Agriculture, referring to Mosquito Squad’s spray. “Eighty to 90 percent is being very, very generous. Mosquitoes are notorious for not observing property lines.”