Zatalyz
This idea could be applicable to secondary cities, but poses a problem in the capitals. This is where new players arrive after finishing Silan. Arriving in a city in the middle of an invasion is really boring. If the city stay inaccessible for several days afterwards, it will be a good way to lose new players. Remember those long moments of painstakingly getting to level 100, before you can make any trek, and where the capital is your only rez! If you don't have access to that anymore, what's left?
The workaround would be to do this kind of thing on the secondary cities only. That would give them interest without penalizing the arrivals. Including blocking GHs: if some players don't like it, then their GH can be in the capital, where it will never be blocked.
I agree that this is a MUCH BETTER IDEA
we would still get the 'City Invasion' events, and be able to participate in reconstruction efforts, without overly inconveniencing new players
good alternative
:)