*'''Prevent account creation''': This should <font color="crimson">'''only'''</font> be checked if the block duration is less than one (1) month, because innocent users and IP's may be blocked accidentally. For all infinite blocks, please ''leave this unchecked''.
*'''Automatically block the last IP address...''': Should only be used if the block is less than one (1) month. For all infinite blocks, please '''leave this unchecked''' to avoid blocking innocent contributors.
*'''Prevent user from sending e-mail''': Should only be used if the user being blocked is suspect to email abuse.
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