Now that the jokes are out of the way, we can dispense with the "mechanic" stuff.
"The stuff is pretty easy."
It ain't. It's not. I don't know how to spell that in Japanese for you. (And I'm not referring to the actual mechanics of the stuff. Notice absence of quotation marks.)
"By selectively riffling and stripping, you can easily manipulate a card from the top to the bottom of the deck."
If you want just one card "manipulated" from the top to the bottom, or vice versa, the task is actually the simplest of them all. No need for any "riffling and stripping", "selectively" or otherwise. Just an old-fashioned shuffle to the last card.
"If your beloved Syph can rig the deck with no training what could a real Mechanic do?"
That you managed to fool some people with some stuff does not have anything to do with what a "mechanic" can do. Do you really think that if you could not easily do "the stuff", that would mean that a mechanic should have more difficulty? (And it's not "rigging the deck", by the way, which is a different thing altogether.)
"It only takes a few high cards to be placed out of play to destroy your long-term advantage."
In single deck, an Ace would suffice. (That was hint for the single-deck games that you are tempted to unleash upon your "unsuspecting students".) For a shoe game the task is more difficult, for reasons of procedure (no face-up cards, etc), while the removal of any one card is of much lesser significance.
"Just curious about your thoughts on this."
It's all strictly a matter of where you play. The location and the ownership of a casino are the prime criteria. Beyond what can happen at the table, you should also consider the value of your outside recourses, if any are available. For instance, there are countries where calling the local police to complain about cheating or being roughed up, could be worse than dealing with the incident without outside interference.
"Shouldn`t you be on the SOFTware page?"
No. I'll have my sake right here, if you don't mind.