1. not. Sure. Hey. website.io is cool now. .ly too. But you don't know how long the rules will last. They may insist you must open a company in this jurisdiction!
2, "You can sue to have a domain name confiscated if you own the trademark with the same name"
Yes sure. What do you know about trademark law and English common law? A few hints: trademarks are granted for classes and a trademark in another class or another jurisdiction would buy you nothing. lets take sampleword.com
A trademark for sampleword for delivering consulting services would not prevent me from running a shoe shop under this domain. Or a trademark in the US would not prevent me from using in in another country. Country specific domains may offer some protection here but not for .com .net