Zerging

All you need to know about zerging- As per Kevan Davis:

Am I allowed to play multiple characters?

You are, provided that they lead completely separate existences within the game - your characters should not collaborate, nor share (or stand outside) the same building. Multiple characters found to be working together in a suspicious fashion will be automatically flagged, penalized or even banned permanently by the system. If you're running a few characters, it's best to make sure that they stay in separate suburbs.

Don't believe anyone who talks about 10 spaces or any other bullshit. Adhere to the statement above and you're golden.