The page that you are seeing can mean one of several things including...
The web site is known to be dangerous or to routinely infect machines with maleware or viruses.
The web site is temporarily compromised because it has become infected or has been hijacked.
This determination is made by a service that maintains a list of sites that are known to host malware or other malicious software, and when a user requests a web page from one of those sites it is blocked. When a problem (if temporary) is fixed the site will be taken off the list in time.
If you feel strongly that a designation is in error, you can connect to Lehigh Guest wireless to view the site -- however I would do this with caution, and from a computer that has current anti-malware/virus software, and that can be easily formatted and reloaded without loss of important data. If you bypass LTS security measures, you do it at your own risk.