Sounddude: Replying to ICMP Echo packets isn't necessarily a bad thing. Very useful for debug purposes for both yourself and helpdesk/technial staff.

I wouldn't be too concerned leaving it turned on.

but no harm turning it off either. We left it on as default on the genius modem.

Just make sure the firewall is enabled on the genius modem! Very important!

Should the need ever arise I would be happy to turn it on at Orcon's request.