That depends on what kind of linkshell you're joining.

There's linkshells that are merely social. A place for friends to talk and have fun. Maybe they'll organize some things on the fly, but there's not any real rigid structure.

Then there's endgame shells (or those similar to it) made specifically for all endgame activities such as dynamis. Those tend to get more drama than any other kind and are extremely demanding of its members.

That's a simplified description anyway.