Seems like four guys with a fishing trawler, a grappling hook, a musket, and a can of beans could take it over. If these kids want to play like they're a full-fledged country, treat them like one. They're laying claim to British national waters...them's fightin' words. Might be a good place to "test" a JDAM.
Principality of Sealand
Reading the article makes me laugh. It reminds me of stuff we did in Elementary school; "This pack of desks is mine! You need my permission to get in! We have our own currency and passports! Go away!"
No UN country recognizes it as a sovereign nation, including the UK. So it you were to declare on and attack it, you would be declaring war on the UK, which recognizes it as part of its territory.
