I'm not sure I like it either. I've read pretty much all the comments here, and I agree that annihilation threads dont really impact roleplaying on the planet. But to have a planet removed from the map could have secular consequences. Specially the less known planets in canon. From what I have seen, most planets develop as a direct result from just being on the map. Forts, Bases, invasions and dominions... They all have added their own history. [albiet a history that can be ignored of course] I've seen materials, technologies, weapons, trade routes, companies and resources all tied to specific planets. And a breakdown on that planet could ruin or put an end to that.
I dont know how people view the map. But I see it as chaos canon. If you tried to use a weapon that is exclusive to a planet and it has been destroyed, could members contest the validation of the weapon, or any material for that matter? Does common materials become rare? For those who do roleplay on the map, will they continue to let their members roleplay on the planet after it has been destroyed?
Perhaps it can be easily dismissed that a planet destroyed on the map doesnt really matter. But there is a unique feeling I get seeing one of my character's homeworld [which is canon] on the map. I asked for it to be there, and dug deep in the wookie just to see if I could find it location. And when it was added, it made me feel a sort of validation to the species I primarily play as. And I wanted to roleplay with major factions on the world. But if it is gone, would I get anyone to roleplay with me, or would they argue the planet no longer exists? I rather enjoy playing as a character who can proudly say where their home is. But if a major faction member refuses to acknowledge it, on the basis of annihilation threads, and doesnt really want to simply ignore it, I feel it would start an argument. Plus the confusion of being asked to roleplay on a destroyed world, where one believes in chaos canon and the other doesnt.
To the few of us. If we see the worlds we cherish disappear from the map, we'd be a little more than disappointed. For me, being on the map, and inside a major faction's borders, gives justification as to why I join the faction. My roleplay style revolves around the planet, its weird I know, but its how I chose to go about it on the board. After the work I did, researching its location, just so I could ask for it to be added.... I would be devastated, disappointed... maybe feeling like my goals would never be achieved, if the planet disappears from the map.
I do not know how long these annihilation rules will be in place. But I dread to see a map where planets are steadily disappearing, making the map more barren with each month. Sure I guess we could ignore it. But what drove me to this site was the custom made map anyway. So to me its more of a... Well what I feel anyway is that the one thing that I am interested in will become less interesting with less planets around. It makes me more sad than anything. Cause once a planet is removed from the map, there will be no more invasions for it, no more dominions, less attention from those who play the map game. And that... if it happens to a world I like... that would make me sad.