How does the site deal with aliases?
Suppose the moderators are convinced about some accounts being the aliases of one principle account. Will all such alias accounts be suspended under all circumstances?
According to Why are people allowed to have multiple user accounts?,
People are allowed to have multiple accounts as long as they don't use them to vote for themselves.
If those accounts are intended to support each others, they will be deleted or suspended; for example we've recently deleted couple of sock-puppets.
For more information, visit How should sockpuppets be handled on Stack Exchange?.
 Some examples: