Sorry, in order to avoid this the devs should take that into serious consideration, not me, as any other game does.
ALT key is one of the most easily accessible keys. It makes sense that they would use ALT in their game. It's not a problem that generally bothers most people, so to make a default change for everyone, especially already accustomed to the key, would be annoying. Instead, key bindings are there to solve exactly this for players whom wish to use the keys for something else. In your case, it would be ALT-TAB without it doing a thing in game.