Why not use -u to remove them?

The /ignore command
/ignore [-lrpcntikdwxu#] <on|off|nick/address> [type] [network]
Where p = private, c = channel, n = notice, t = ctcp, i = invite, k = control codes, d = dccs.
The -u# switch specifies a delay in seconds after which the ignore is automatically removed.

I refuse to engage in a battle of wits with an unarmed person. wink