To avoid that, you can simply limit the Steam download speed. However, if the games are big then steam using up all the available bandwidth can really hamper your daily browsing and other internet activities. If the games are small then the bandwidth consumption may not be a big deal. For instance, I have a 20 Mbps connection and Steam uses all of it no problem. Most of the time, Steam will max out most home user’s internet bandwidth. The thing I really like about the Steam client is that it downloads games very fast.
