[MENTION=746641]VegasGambler[/MENTION], yep, you're right. I was pretty sure the agent was wrong, but now I think they were correct.... given the language 'NO SHOW RULES OF RESTRICTED FARES APPLY' (which was on my full F fare; just checked).
It sure is confusing though... why wouldn't the fare rules for a full F fare simply list the actual no-show rules, like a restricted fare does?