Add people slowly. Don't add everyone in one sitting. 2-5 every hour. Accept 2-5 friend requests every hour. Facebook doesn't like spammers.

Don't spam peoples walls/groups. Again, facebook doesn't like spammers. Make sure there is at least a minute between each of your posts.

Play games. Games are always good, it shows that you are a human. You can play either a facebook game or connect a game to facebook ( if you can )

Try and not use asian characters ( hangul/kanji/ect ) facebook is catching on to that. But also don't use the idols full name ( Choi Minho/ Park Jiyong ) change the name into something uncommon. You can use English names, Japanese, Korean, ect but make sure your idol name is inserted somewhere, either in the name itself or the alt name so everyone knows. ( Meto Aoki/ Yixing Yao/ Giri Ackels ). If you can't change the name that is okay. This is just a suggestion.

Do NOT make you current/home town Seoul Korea, Tokyo or any other place that is common. Preferably change it to your actual place, and set the setting so only you can see it, but any uncommon place is good.

Change all your settings to private or friends/friends of friends. ( refer below )

Enter your number if you can, you can always change