There are people absolutely everywhere with that tag, saying inactive 28 days whilst on vacation. It is a cheat to set it to vacation mode and never return, it is unfair. There really should be a limit to something like 1 month vacation mode. If that's not enough, just come back and set it again. If they're going to set it to vacation mode and it runs out, they're not going to be bothered to come back to fix it.
There are millions of resources sitting there on planets that can never be attacked because of this CHEAT. Please do something about this, it's VERYunfair and annoying.

ajhcraft,
Yes, I agree, this is very annoying.

Vacation mode have exception for asteroids: they can be attacked after 28 days.

And also vacation mode has no effect on special planets (all first planets of Arms) [X:1:1]

Sunny,
Victoria,
That's not what I asked.