[TF2] [Improvement Request] Make teammates immune to friendly melee attacks for weapons that don't require it

[AzureWoof]

One of the most frustrating problems with TF2 over the years that comes up quite a bit during gameplay is the fact that teammates can block your melee hits when trying to melee attack an enemy. This is especially frustrating in situations where multiple of your teammates are trying to melee attack a singular target at the same time due to the fact that all of those melee attacks will prioritize hitting your teammates and will do no damage while the enemy is free to attack your teammates with no risk of harm, This is also very annoying when playing Spy, as you can have your backstabs get blocked by teammates, which will easily result in your death.

However, the Disciplinary Action melee weapon for the Soldier requires you to be able to melee your teammates to take advantage of it's upsides, and the Engineer's various wrenches still need to be able to help resupply and repair friendly buildings, so those items should be looked at carefully if this change were to be considered.

[SirBlockles]

while i can't speak for the disciplinary action, engineer's wrench swing already prioritizes buildings over ANY players, friendly or enemy (ie if a spy is standing between you and your sentry and you swing at him, you will hit your sentry behind him), which means the wrench theoretically wouldn't even need any changes - if anything, it would be nice to be able to melee a spy dancing around your sentry spamming sappers instead of accidentally unsapping it.

[Jgr9]

I'm pretty sure this was intentional right from the start - along with teammate push so players can't all stand in exactly 1 spot easily. but yeah it's most frustrating with melee.