Two airlines have agreed to demands from airline attendants and family groups to filter porn on their in-flight WiFi services. Both American Airlines and Delta announced this week that they would block sites that are considered inappropriate for viewing in public, though problems involving Internet pornography have yet to be reported.

"Since the launch of Gogo, American has not experienced any reported incidents of customers viewing inappropriate content via the Gogo service," American Airlines said in a statement issued earlier this week. "However, we believe this is an appropriate measure to take."

Gogo is AA's in-flight wireless service offered on select domestic flights between New York, San Francisco, Miami, and Los Angeles. The service is being offered through AA's partner, Aircell, and was just rolled out this August. But even before WiFi service was launched on any US-based airline, religious and family groups worried about the possibility that travelers might be tempted to join the one-person Mile High Club and pull up some porn in the presence of children, flight attendants, and the general public on the plane.

Despite these early protests, AA seemed to take a cautious approach to the "problem." Airline spokesperson Tim Smith said last month that the "vast majority" of customers already use good judgment in what's appropriate to look at while flying versus what's not. "Customers viewing inappropriate material on board a flight is not a new scenario for our crews, who have always managed this issue with great success," he said. Clearly, that view has changed.

In addition to American, Delta also announced this week that it would filter its Internet connections when the airline's own WiFi service launches later this year. "Blocking will be limited in scope and will be for sites that few, if any, would question are inappropriate to be viewed on an aircraft," Delta spokesman Kent Landers told the Atlanta Journal-Constitution. "Our focus is to achieve a balanced approach."

Delta also originally said that it would rely on its flight attendants to take care of inappropriate situations, but it now favors an automatic approach.

Critics have pointed out that porn-filtering systems have a tendency to block not-so-pornographic content, such as that from Vanity Fair and educational material. Delta insists that this will not be the case with its system, although the airline did not specify exactly how it plans to do things differently.

In-flight WiFi, on its own, though, doesn't quite open up a Pandora's Box of sin—travelers have always been able to bring video porn onto planes ever since the advent of the laptop and portable DVD player. Before that, the plethora of "men's magazines" being offered at airport kiosks have made (and still make) it possible.

We guess all those swaths of travelers who need to get their porn fix in the air will have to go back to preloading it on their laptops before they board.