Well, I was all nice and happy mining away on rich roids yesterday when five Sisters probes popped onto my Directional. So got everyone safe to the POS, got out my combat ships and both of us scanned with combat probes...and got nothing. He was in a cloaked Buzzard. We finally managed to catch sight of him and Nick correctly concluded he was German and said "Guten tag" in local.
This got a reaction from the prober, who convoed him,(he wouldn't talk in local, he said later, as I had tried to speak to him in English). Nick used Google translator and got that he was from a wormhole next door, so we hurridly scanned down his WH exit. It ended up being a Class 4 with a Carrier and active pilots. This did not look good.
The pilot kept claiming he was "practicing" on probing out all our sites, as we could see the probes moving about on our directional but there was nothing we could do about it. Sure you are buddy. If he chose to warp to every sig and make all our sigs pop, we could see no option.
So I told him to tell him we were going to close his WH and he ought to get back into it. We dragged our Ishtar and Damnation to the hole and sat on it, while I drove a Retriever, a Myrmidon and a Harbinger through it til it went critical.
He never came back after that. So I guess that option worked.
So how does everyone else deal with rampant scanners that might screw you out of all your sigs?