For example, this prohibition includes, but is not limited to: malicious software or “malware” that is designed, intentionally or unintentionally, to infiltrate a network or computer system such as spyware, worms, Trojan horses, rootkits, and/or crimeware. “denial of service” attacks against a network host or individual user. and “spam” or unsolicited commercial or bulk email (or activities that have the effect of facilitating unsolicited commercial or bulk email).<br> Data Service may not be used in any manner that has the effect of excessively contributing to network congestion, hindering other customers’ access to the network, or degrading network performance.