To the basic question the OP had (and ignoring the boorish behavior by the man he encountered).... On the exec courses I know a lot of people who feel pressured and uncomfortable when the group behind them pulls up to the tee boxes before their group has finished teeing off. I personally prefer that the group hangs back to a safe spot before the black tees until our group finishes teeing off. Space, quiet, prying eyes, etc... To me it is an etiquette issue. I think more women, especially newer golfers, are bothered by this than perhaps experienced male golfers. JMHO of course.
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Maryland (DC Suburbs) - first 51 years 
The Villages - next 51 years
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