What I want to say is...
1. Calm down. If you can't, shut up!
2. If there is a suspected abuse, report to <staff@airlinemogul.com>, esp. if you see someone new coming up with 30 B377s.
3. As long as an airline is "legal", it is not an "abuser". You may want to think of it as one because of your own beliefs, values, ideologies, or fantasies in the "sim" portion, but in "real" context, a legal airline is not guilty. An abuser could not be legal, while a legal player should not be branded as an abuser. (Please note that by saying someone is abusing 0.5, you are implying that they are operating out of the legal boundaries, which means cheating.)
4. This is a simulation game. The "sim" part is a description of the "game" part.
5. Everything here is done according to the game rules, instead of some player's ideology. If you want things change, you could try by suggesting it. However, until it is changed, other players could do as they want within the limit of the rules.
business aside, personally...
6. It is noble for players to hold high standards and to try simulate the real life situation logically. However, we also have to realise that it is a business decision on our part not to use too many 0.5's. For that business decision, we need to pay. While that kind of decision is made on free will, we can't say because the others aren't doing the same, they are immoral. This is the same as real life, where you gain less by being a moral, socially responsible employer. We have to accept the consequences of our business decision, so we should not be whining about it.
7. Tune the 0.5's down.....
8. If you don't like it, leave. There is no one forcing you to stay (Cornfield's Rule).