facebook limits banned or not banned

Hi,
A little poll :
I'm trying to :
- import contact in FB
- add friends
- send messages ...
And sometimes it works, and sometimes not ... (I'm using different account with different ip).

Examples :
importing 5000 contacts => banned (phone verification etc ...).
importing 1300 contacts => ok

adding friends (with imacro) :
500 friends in 1 week => temporarily suspend (14 days).

sending messages (with oCommunity):
less than 100 in a few hours => temporarily suspend.

And you ?

According to FFAP the software has option to add 18-22 people a day. Now thats 154 weekly and i guess since they made such a software with efficeny they must have tested on whats a safe limit. 154 seems decent if you think of it having 100 accounts than you have 15k friends weekly (you can increase the rate after one week)

FB 101: Stop sending friend request, and figure out a way to get them.

Hell I was adding friends that FB suggested and it banned me from adding people.. so who the hell knows! Damn FB!

I just started a new account for a new business... No spamming and only one facebook account and I got suspended for 3 days from adding anyone else!!!

Funny thing is that I was adding real friends. If friend request take long to confirm you or you have a couple of ignore request it puts you on the fast track to banned/stopped of services. SO BEWARE!!!

Around 25-30 the pop up do you really know this person started to pop up for me.

Question:

How do people manage to have so many different facebook accounts?

Do they use a different Proxy Server for each account.

Put different picture on each account (so facebook does not link users).

Does having a different picture really matter?? Does facebook really check for this?

Is there more things to do like different geographical locations per account?

Do the servers/IP need to be close to where facebook account user resides?