"Yasuo's windwall doesn't block lasers like lux's ult!" Well is sure as fuck blocks Viktor's laser, so that's a blatant lie. Here's a list of things it shouldn't block.
Illaoi's E Viktor's LASER! Thresh's hook Blitz's fist
None of which are projectiles. If riot technically labeled them as "projectiles" then they're idiots, because a rocket fist that retracts is not a fucking projectile. A laser sure as fuck isnt a projectile.
Lmao Get Mooned4 votesDownvoted by yas mains, what did i expect.
The Last Ballad3 votesYou don't really understand how league works, do you? A projectile in the game is any non-unit object that has a travel speed. Blitz's fist? It doesn't have it's own health bar(Tibbers, Shaco box, Malz bug) or action(Azir's soldiers, Maokai sapling(but only after it lands), Orianna's ball) apart from Blitz, nor is it an instantaneous effect, such as Vel'Koz's and Azir's aa's, victor's q empowered aa(which is a true laser) Annie w, and Brand w/e, so therefor it is blocked. Same with Thresh's hook and Illaoi's e. With all of these you could replace the visuals with ezreal's q's visuals, and they would function exactly the same. Why? Because the animations are there for flavor and to make the champ feel alive, not to dictate how they function.
Short version Not Blocked: units, effects that do not have travel times Blocked: everything that is not a unit but does have a travel time
Why is it this way? Simple, for consistencies sake. Why should everyone have to remember that an Nami bubble cannot go though, but a Blitz hook can? Why should Thresh's hook go through when Morg's binding and Lux's q and e cannot? The bindings and the singularity are just light, so why should they be blocked when a PHYSICAL HOOK is not?
Much easier to just have it be "if I have to shoot it through the wall, it will be blocked" both for the player(I do not want to have to memorize what can be blocked by the windwall) and for the programmer(making exceptions isn't exactly easy, and doing that just to make the game harder to learn for the player is dumb).
Darkslayer852 votesIt blocks "hitbox" projectiles. Not realistically projectiles.
ChaddyFantome2 votesIt blocks "hitbox" projectiles. Not realistically projectiles.
auto attacks dont have hitboxes.
Shadòw1 voteswell it doesn't block 
which is very nice
Punkkee1 votestrolling?
Astôlfo1 votesAre you trolling?
The Great Divide1 votesI have to say, the fact that yasuo's windwall blocks viktor's laser, I don't have a problem with. Yasuo may be frustrating, but viktor's laser makes you want to throw your laptop out the window: E E E E E E E E E E E E E over and over and over. And lucky for him it instaclears the wave, so he can have all the time in the world to harass you under tower. Yasuo may be bs, but viktor provides equally frustrating bs in one ability.
