Its far from game over.
What will happen is "Hey guys were beat, log off for 12 hours and then get out." Your completely underestimating the determination of the player. As well as before you log in...you scout with something, unless your a complete idiot, which, Hell, will happen.
You choose that as its 100 % safe, verse, I will take my chances.
If your wanting to do the "aggression" thing, will work both ways, on all teleports, internals and externals.
If you do the timer you nerf all mobility of a fleet, but I'm not saying that is a bad or good thing.
Also I do wish to point out, this will make any fast lock bot the way to go. Have him on a tele, wait for a hauler to move off to plant there tele, log in, agress, kill.