Apparently the National Labor Relations Board decided to uphold a a non-fraternization rule among workers. (This comes from CWA union info)
"Security firm Guardsmark instituted a rule directing employees not to "fraternize on duty or off duty, date, or become overly friendly with the client's employees or with co-employees." In September 2003, the Service Employees International Union filed unfair labor practice charges with the NLRB against Guardsmark, claiming that the company's work rules inhibited its employees' Section 7 rights."
The National Labor Relations Board upheld Guardsmark despite the fact that there was already a rule prohibiting dating. Sounds like an attempt to prevent unionization to me? I guess I'm not suprised that the Bush so-called "Labor Dept" would uphold something like this.