You can have as many neighbors as you want in DM. It just does not show all neighbors in the slots but you can still have unlimited neighbors in DM. For neighbors just add those you feel are trustworthy. I added random people myself, so you should be fine but if you don't really feel safe then you can do it the other way.
I have about 600 dragon city friends and they accept the horns I send them most of the time. I got these friends from writing add me on the posts from the dragon city app page. Hope you get lots of friends too :D
I'm sorry we cannot post a link to such a group, that would be against DCW policy -- we do not advise adding strangers to your FB account, or creating a fake/duplicate account for games so that you can add strangers safely, etc.
I believe Mechlord has probably joined such a group, but please do not ask him to post a link. Users posting such links will be immediately banned and have their post removed.
They have to accept your request when they are at level 2 or higher. They have to click accept in order for you to get gems. It's really hard for new players to know this, they think if they click accept they will have to do something.
Mechlord, please do not discuss the specifics of profitable glitches...that is a bannable offense. This isn't the first time you've been warned about it. Please don't do it again. In the discussion you notice that no one else mentioned how to use the glitch to obtain the breeding nest. Only you. You can be banned for this and next time, you will be.
I saw your question about the age requirement. Wikia policy requires you to be 13 yrs. old to make an account at any Wiki. This wasn't such a problem for underage users in the past because they could still participate as an unregistered Wikia contributor. Then there were new laws passed to protect kids and now everyone has to be registered. But we cannot ask anyone's age. So, what I don't know, I don't know. But if someone openly says how old they are, and they are underage, I have no choice.
LOL, thanks for that Mechlord, but you do not have to tell any private information about yourself to anyone, unless you are being considered for a staff position here. For your own safety, it's better if you don't offer private info to anyone. Like I said, I don't know anything unless someone tells me flat out. I hope no one else does.