[tyingq]

Do be aware that some passengers have oxygen generators that could be mistaken for an ozone generator.

[Someone1234]

I agree they could be mistaken by another passenger not familiar with oxygen concentrators, which is a good argument for avoiding vigilantism in general.

If you have concerns let the flight crew know quietly, and they can find out politely if the device is within policy (which oxygen concentrators of course are).

[m463]

My friend had one, and it would generate oxygen, and simultaneously fill a portable tank for going out.

I don't know the protocol for air travel - do you generate O2 with a device during your travel or carry an oxygen tank?

I could imagine scenarios where a pressurized tank on an airline is bad, and also scenarios where a device would be bad too.

I've also heard of people that had medical conditions and they just weren't allowed on the plane at all.

[cameldrv]

Oxygen concentrators are allowed, but they have to be FAA approved, you have to have a prescription, and they have to be battery powered (you can't plug them into the seat power).

[Wistar]

Most of the O2 concentrators I have seen are used with a nasal cannula. Don't know about ozone generators.