lol'd
A bit off topic, but I found that amusing.
Just my thoughts on the matter:
Though this could be quite annoying, it just means you have to implement your own countermeasures.
First of all, cloaky ships usually have to sacrifice DPS and tank in order to gain the ability to cloak. The only ships capable of warping cloaked are frigate and cruiser class ships, and are easily countered by a same class ship (typically). By bringing a battlecruiser to protect you while you mine, you should be quite capable of defending yourself against cruisers with the superior damage and tank available to battlecruisers, and with the drones in the mining ship and the battlecruiser, you will have acceptable damage against frigates, easily enough to destroy them before they kill you. (T3's notwithstanding, those are... anomalous)
Secondly, you are in arguably one of the most dangerous places in space (or at least, it should be. The fact that it isn't considered so is, in my opinion, a ridiculous testament to mechanics and how the safety available to people in null should be... altered.) You should not be mining/ratting without a PvP fitted escort capable of assisting you should you be ganked by something capable of killing you before you kill it. In null, I believe this should be considered mandatory, or you should be prepared to lose your ship.
Thirdly, the ships that can't warp cloaked are vulnerable because they need to uncloak to warp, and will be visible on D-scan before they land, giving you time to warp out, if you're paying attention. And you will know their ship because they will have been visible, and you will know in advance which ships to bring to counter them.
I can see where it is annoying, but I don't see why you think you should be able to sit in null or low sec, mining or ratting with absolute safety, pretending that you don't have to worry about anything.
Your actions dictate how you respond to such a thing. It is your choice what to do, and there are a lot of things that could be done to reduce the risk, should someone cloak up in a safespot in system.