Here is the source on Grohl in Lake Braddock:
http://www.washingtonpost.com/blogs/the-state-of-nova/post/dave-grohl-bio-cites-many-northern-va-historical-landmarks-for-future-nirvana-foo-fighters-star/2012/09/28/cb22a58a-0823-11e2-a10c-fa5a255a9258_blog.html
The Lake Braddock pools do not sell memberships, so it may not be an option if you don't live in Lake Braddock.
I don't think they have pools. Sure, cameras might help with theft, but they aren't going to help with drowning - except for the lawsuits that follow.
Guess it depends on what you mean by 'Pool Security'. Which sounds like a good name for a band. But not as good as Foo Fighters.