What Spreads Faster Than Bedbugs? Stigma
nytimes.com
nytimes.com
https://secure.wikimedia.org/wikipedia/en/wiki/Diatomaceous_...
DDT actually wasn't all that bad. The problem was that it was way way way overused (back in the fifties they were literally pouring thousands of gallons into lakes and rivers because they thought it would be a good idea to get rid of the mosquitos).
It would be nice to see some balance on these sorts of issues, but at the very least I expect that soon enough we'll see some hypocrisy. At the moment it is most delicious to watch, so to speak.
Such resistance tend to come at a cost that makes the organism otherwise less fit and removal of the selection pressure can change the population. Also, how much of the current population started from ... imports, as it were?
Anyway, as I understand it, the EPA has outlawed the use of all pesticides that really work on bed bugs, so the problem's a lot wider than DDT. It's just that our insane fixation on the eeeevils of DDT make it the iconic pesticide we've managed to ban (at the mere cost of 10s of millions of lives).