Whether THE flag has thirteen stars or 50, it is either the flag of this country past or present....it's still the flag that represents this country. Too many men (and now some women) have fought, spilled blood and many died for that flag (past or present). It's the symbol of our country and if we don't keep some things sacred in this country so that people understand there is (at least by some, including those who represent us) a respect for them, nothing will be held sacred any more.
They didn't die for the flag, they died for the country.
Or are we counting flags with 13 stars, or Stars and Bars, or 48 stars, or ones with snakes on them that say "Don't Tread On Me", or ...