SOF2 Serial Question

[KingPickle]

I got a PC at home and a pc at the office. I want to put SOF2 in the office for "Lunch Breaks", but I dont want my serial to get blacklisted since it's installed on my home pc also. Do I need to worry about this? Will I need to buy another one for the serial key? Do the servers blacklist only if alot of people are using the same serial or just more than 1? Thanx