"Good use", as in for the good of their bank accounts. What else did you expect?

There are legal requirements for the number of passengers per cabin crew member, for safety purposes. I believe it's in the region of one per fifty passengers. Since you have to have them on the plane, they might as well sell stuff.

Of course they have financial interests in colluding. Any alternative company that starts competing with them is a threat to both and it is clearly in their interest to wipe them out, by working together if need be.

Definitely whoosh.

As of this post, yes it is.

Why can't I expect free online play forever? I have it with many other older games.

Dignitas and so forth are fairly thorough in making sure it's not a spur of the moment decision, but a carefully thought out and planned one knowing all that's involved. That handles most of your point 2 already.

It doesn't need to destroy a plane to have detrimental effects.

We *know* that electronic devices can, in a practical sense, interfere with each other. This is simple physics.

The tolerances and levels involved are what is at question. The decision is made on the side of safety.

Also, all that shielding adds up to a lot of extra weight. You don't add unnecessary extra weight to a commercial aircraft - that costs a lot of money.