Can I ask a question?
Go ahead, Miss.
If your probes don't see anything before you lose 'em, wouldn't that mean that what kills 'em is moving faster than light?
I mean, the light's comin', but before it gets there, BAM! This border-thingy hits the probe and it's all shrapnel and sparks.
Ah, the "Faster-than-light border-thingy bam!" theory. . . riiight.
Before you continue your obligatory mock, I'd like to point out that this lady can very aptly demonstrate "bam-with-shrapnel and sparks," and is not known for her restraint.
There's lots of him. Who'd miss this one?