So fix the bloody flaw. STOP HIDING FILE EXTENSIONS.
I'm not saying that I disagree, but in that case they would also have to stop supporting running unix executable files from within Finder or disable custom icons for such files.
Warning dialogs should ONLY be brought up before *rare* and *irreversible* actions. Not common ones.
Depending on point of view, launching a downloaded application for the first time could be considered rare and could definitely result in something irreversible.
The reason for the dialog you get when launching a downloaded application for the first time is to counter an otherwise existing flaw where an application could be disguised a document.
The key part of the dialog message is not that the file was downloaded from "the Internet", but rather the fact that the file is "an application".
And when you really think about it, paying any price for a digital download is simply price gouging anyway, since the cost of reproduction is zero. That means at $5, Trism is marked up 500 times. No wonder he got so rich, huh?
You seem to have a moral objection against high mark up percentages. Your first error is discussing margins in terms of percentages of costs. The only case where this is meaningful is when there is a risk involved with the cost. Since you disregard development costs, marketing costs and write-off costs, the remaining cost (distribution + "replication") carries no risk.
The markup percentage has nothing to do with how "rich" you get. Your profit comes from absolute margin times volumes sold. An acquaintance of mine runs a business with a "mark up" of < 5 % and they are still able to make loads of money. Are they saintly in your eyes?
If God is perfect, why did He create discontinuous functions?