Interesting stuff! Sounds similar to how ouija boards and dowsing hijack the natural quirk of the ideomotor effect.
I have some peculiar ancient texts you could 'translate' and then you're off and away, Pup!
I don't know if I'd go so far as to say Christians "hijacked" glossolalia.
I would.
Even just reading the posts here, it's clear people associate glossolalia with Christians, rather than Plato and Virgil.
Anyway, it seems clear Christians hijacked glossolalia back in the second century, if not earlier, according to wiki:
"Biblical practice
There are five places in the New Testament where speaking in tongues is referred to explicitly:
Mark 16:17, which records the instructions of Christ to the apostles, including his description that "they will speak with new tongues" as a sign that would follow "them that believe" in him.
Acts 2, which describes an occurrence of speaking in tongues in Jerusalem at Pentecost, though with various interpretations. Specifically, "every man heard them speak in his own language" and wondered "how hear we every man in our own tongue, wherein we were born?"
Acts 10:46, when the household of Cornelius in Caesarea spoke in tongues, and those present compared it to the speaking in tongues that occurred at Pentecost.
Acts 19:6, when a group of approximately a dozen men spoke in tongues in Ephesus as they received the Holy Spirit while the apostle Paul laid his hands upon them.
1 Cor 12, 13, 14, where Paul discusses speaking in "various kinds of tongues" as part of his wider discussion of the gifts of the Spirit; his remarks shed some light on his own speaking in tongues as well as how the gift of speaking in tongues was to be used in the church."
http://en.wikipedia.org/wiki/Glossolalia
I can understand your POV, however charismatics existed long before America was discovered. The section on Church Practice in that wiki entry is particularly interesting.
Enjoy!