I'm going to block m friend on every platform.
Why would you want to block your friend?
They're being very annoying.
If you think you cannot get along with your friend and it's not working out, you have all the rights to end the friendship. Still it's better if you talk to them first instead of blocking.
I don't care, I'm going to block them anyways.
Blocking your friend is one way to end this toxic relationship, but I don't think it's the most mature thing to do. Perhaps have a conversation with them so they can work on themselves a bit and perhaps it could benefit them in the future. Consider their feelings before simply blockings.