Um no? Try is house analogy.
I have a model home. I put up a big sign advertising to come check it out. Now I can't complain when people start showing up wanting to see my show home. But when I'm done showing it or no longer want people coming in, I lock the doors.
Thats how routers work. If you don't like it don't put up a sign saying 'welcome' or a least lock you doors.
Hopefully this is the better analogy.
"...a most excellent barbarian ... Genghis Kahn!" -- _Bill And Ted's Excellent Adventure_