Yes, this was the normal practice during Vietnam, and we lost in Vietnam. Back in those days, there wasn't a 24 hour news cycle, or a completely rabid left wing media (at least not like today). And while Bush Sr's enactment of the ban was cast as vanity in the media, the fact is, the media at the time was doing the very thing I am talking about here — politicizing the return of America's war dead by showing the president in an inopportune split screen.
It's worth noting that Bush was a naval aviator who served this great country proudly during World War II, fighting along side fellow Americans. Yet, serving as President of this country, he was lambasted by media whom likely never served a day in the military for laughing at an arbitrary moment of the media's choosing. Americans don't join the military, and then make the ultimate sacrifice, in order to help make the point for the anti-war left. Americans join to help fight for freedom and to help America win the conflicts we face.
The military has wars to fight on behalf of America, and our enemies are not wasting their time hand-wringing over issues such as this. Rather, they are focused on how best to kill us, so as to have even more of those coffins pass through Dover. Our enemies are starting to see a new administration with little experience, that is cutting military funding, closing Gitmo, setting terrorists free, and now letting the left wing media politicize our war dead. Our enemies realize today that with every American soldier killed in action, they've not only won a battle but also gained a propaganda victory with the help of their (hopefully) unwitting accomplices in the American government and media.