The BMX, Mountain Bike, and other bikes have now Vehicle HP. Try it with your friend sometimes and see if the indestructible vehicle in GTA_SA can now break.
They've had HP forever. Are you saying that they explode when they reach 250 now? If so, I haven't seen any update on that.
If you really want the President dead in the sky, just ram or shoot their Shamal or Rustler and if they're camping with the use of Helicopters just shoot them till the vehicle hp is low and have patience if you want to reach them above 20,000-30,000 feet off the ground.
I'm not sure if you're trying to be sarcastic or not, but you're right, it really is that easy to kill a flying President. If other players have trouble with it, they can learn. It's a game.
If you're complaining about getting up to the altitude of a helicopter at the maximum height (ceiling) of 815, then learn to climb. My videos show me climbing quickly often. You can climb at a rate of around 12.5 Z units a second, which means that if you start from 0, it takes about 1:05 to get up to altitude, and once you're there, the helicopter is dead.
Here is a video of me shooting down a Shamal with a surfer at the maximum altitude, which is considerably more difficult than shooting down a Rustler. You can see how I climb quickly, and how I easily take him down once I get to his altitude. Two okay people with Rustlers could easily take me down at the same altitude.
If you want a true answer, we block some certain things like that so the game(or server) can be more interesting, challenging, fun, and competitive for all of the players like us, Clan Wars everywhere(it's fun to have clan wars here 
), More players can join the server. If you wanted this things to be removed then it will be no FUN at all. Please think harder first and think about the other players' reaction to this kind of suggestion.
You have an different idea of "interesting, challenging, fun, and competitive" if you appear to believe that Presidents flying Rustlers is at the very least challenging and competitive, but still think it shouldn't be allowed. At the same time, you manage to work in clan shit into "interesting, challenging, fun, and competitive", when a central tenet of most clans is basically "refuse to shoot select people on the other team because of their clan or status, but it's open season on everyone who is new to the game". Many "pro" players seem to spend much of their time killing easy people so they can point to their K/D ratio and pretend that they earned it playing against regulars.
For the Rustler and Shamal thing, you don't have any problem with that because you and other players are good at flying at all kinds of planes and helicopters and it is based on your names that you're a pro at flying them.
So, is this similar to how clan tags sometimes indicate that a player is a pro at ignoring the gamemode and only attacking people who are far below their skill level with 2-3 other "pro" players at chokepoints like the armor spawn?
More players can join the server.
Not if they're being scared off by the fact that the entire server is biased towards the regulars, and the regulars often try to keep it that way.
From SACNR server monitor:
Posted by Exp at 17:41:30, 27/11/2018:
Nice gamemode the community sucks. Angry 24 7 don t try to kill the people with TAG they will be mad at you and chasing you till you quit the game
Posted by Hakim at 13:59:15, 08/12/2017:
Its good Server but Not for nee Player their Aren t welcome because VIPs will Team Up and kill even Go their in Different Teams Like Cops and terrors its very unbalanced
I'm sure we've all seen new players come in, realize that they can't do whatever thing they wanted to do, get killed by regulars constantly, then announce that the server is dumb or unbalanced and leave. Regardless of whether you agree with them, that doesn't come from nowhere.
I think MegaPilot's point is pretty clear. Some things are blocked just because people don't like them (usually because they never actually try using those things themselves) and/or they feel like they take away their advantages. Other things are allowed, even though they're blatantly unfair. Not good for the server, and it drives new players away.
