Well one of my towers in NPC Null has been reinforced and looks like I'll be losing not just that but the pair of towers that was part of.
They used capitals to RF the tower AND previously killed a tower elsewhere with dreads and carriers.
It's a pain and very unlikely I can do anything about it, I can't repel fire of that magnitude!
That said, I have a couple of ideas to disrupt any fleet that comes to kill the tower after the RF period is over and I know that my Alliance will be trying to do something to harass and stop the tower being killed.
RF Timing isn't great for me (I think its ~3am in the morning my time) but I've already come up with a few ideas on how to piss off the attackers when they return.