Setting Antispam API Key in Multisite Network

Hello, first post here. I'm in charge of a Multisite installation with many users. We have TypePad Antispam plugin installed and Network Activated, but most users forget about setting up an API KEY for their blogs.

I wanted to know if there is any way to hard-code an antispam API by default in all blog subdomains created... So users dont have to enter their own API Key and we make sure spam is filtered and subdomains blogs are protected.

Thank You.