Well, they are to Affected, because :
If you Pool mine, you dont need any Bitcoin Clients Running (Except the one to receive your BTC).
If you Solo mine, you only need one Client started as "bitcoin.exe -server" and connect the Miners via IP to it.
Greetings,
frog
not to mention if you're solo mining and your bitcoin server is behind the same router, it's not even going outside the lan.