i would like to suggest that if you leave a legion all legion alerts are invisable to you just to stop exploiting them say someone shares a planet saying help gaurd or somthing and you leave i dont think you should be able to see it please say if you agree, disagree or want to expand

They already do.

no they dont i have tested this as me and someone in my legion came to an agreement he let me take his planet he shared i left revenge and tagion invaded came back but this was done friendly but if someone was kicked they likly want revenge and take a planet of someone in the legion

It's difficult to understand what you're saying. Do you mean he shared a planet, you colonized, and they could still see it or what? If it was in more than one person's scan list then it wasn't because of the Legion Alert.

ok so someone post colinise planet they are its first owner so dont gaurd then someone leaves legion joins another and takes i think that the planet should have been removed from his scan list

I think he's trying to say planets he's colonized from legion shares. If someone in your legion shares a planet from their database, and you leave the legion. The planet is still in their database. Which means if you leave the legion they can now take the planet themselves, or share it with their legion and someone else can take it. I think it's great the way it works. If you intend on leaving a legion and someone shared a plaent that you took, know that they can still reatake the planet. A simple planet flux negates this.