Flying machines in the wilderness would be AMAZING. Not because I can TNT bomb someone, which I'll get back to, but because we can have transportation and automatic machines, such as the automatic ice bridging machine I want to make with a flying machine.
Coming back to the TNT bombing, this really isn't an issue. I'm pretty sure I'm one of about 3 towns with explosions toggled on, so as long as you have it off no TNT bomber can blow up your stuff or hurt your mobs, so it really isn't an issue.
Plus, my intent to make fully automated ice bridging machines helps the whole community as it would allow ice railways to be made from /warp Europe to /warp Africa in mere hours.
Seems like a no-brainer to me.
Adding to this, TNT also cannot damage you as long as you don't have PVP on, in which case a TNT bomber would be fair since it's still PVP. Plus all TNT bombers require TNT dupers which nobody can use without getting banned (common sense tells you not to use a TNT duper lol)