They originate in Taiwan, but they have a company registered in Fountain Valley, California. Company number C1362992, registered since 1986.

http://www.bloomberg.com/research/stocks/private/snapshot.as...

Feel free to search for it on the California Secretary of State's website: https://businesssearch.sos.ca.gov/

If they have legal incorporation in the United States, it is fair game for the FTC to go after their US-based company for failure to protect US consumers. Don't want legal liability in the US for your business activity, don't incorporate in the US.

As long as your product is FCC certified, you're allowed to sell in the US. And if you sell in the US you can be subject to action from multiple federal agencies looking out for the end user, the FTC being one of them. Where you're incorporated has little to do with it.

Back to my point, singling out DLink when every other vendor has similar practices smells fishy.