No you can't.
Anyone from friends/guild/neighbourhood can add to your GBs
You can stop people adding by disconnecting them from the town hall but this also stops them working
Why can’t this be added?
because neighbors are stealing the places with big profitwhy do you want this changed?
because then we couldn't level up GBs of plunderersWhy can’t this be added?
No not really, not all guilds have a 1.9 thread. Like I said my old guild no one even had an arc and then when there was one (me) it was only very low level (obviously as I'd only just build it)because neighbors are stealing the places with big profit
in his guild there would be 1.9x sponsoring
isn't that obvious
because then we couldn't level up GBs of plunderers
@Biffon69 This has been suggested and dismissed many times by lots of people over the years. It would be a fundamental change to the game and would render other GBs such as The Arc pretty much obsolete.
Part of the challenge of the game is to learn how to control the levelling of your GBs without others getting in the way. When I was in an early era I looked at outsiders putting into my GBs more as a blessing than as a hindrance as their donations helped me level faster, even if they were making a profit from it with an arc bonus - I didn't understand how that worked at the time but considering neither me or anyone in my guild had one all donations were gratefully received.
Not that it ever will be but why do you want this changed?