Blocking Adsense Link Unit Keywords

[Netphase]

Is it possible to block specific keywords on AdSense link units?

Link units do well for me, but they also show some keywords that I would rather not have on a certain "family friendly" website. One example is any thread mentioning the military brings up the keyword "Military Gay" which I would like to block if possible.

 

[dogfighter]

Would their competitive ad filter work? Block all of the ads that appear when you click that link? I'm pretty sure there's no way to block by keyword.

 

[Netphase]

Would their competitive ad filter work? Block all of the ads that appear when you click that link? I'm pretty sure there's no way to block by keyword.

That wouldn't really work because the keywords would still be showing and that is what I want to remove. I guess I might just have to replace the link units on that site.