Antis wrote:
Turns out that stealing is one of the more reliable ways of getting rid of enemy commanders. For extra fun, you can try out cards like
Desertion,
Gather Specimens and
Commandeer, which basically steal their commander from the stack so it comes onto the battlefieod already on your side and they don't even have a chance to sacrifice it

Just a head's up: Commandeer says "non-creature"

So, there will be very few commanders you can use this on.
Arcane Archer wrote:
So then one more follow-up. If someone uses an instant to control my commander, it is changing from my side of the battlefield to theirs. Does that count as a instance where I can replace that movement with sending the commander back to the commander zone?
Take a look at the
rules posted on this site -- they're in friendly, easy to understand terms (and not the lawyer-ese that the Comprehensive Rules are written in). Hopefully it can clear up anything -- and, if you still have questions, feel free to ask.
The rules there say this about the zone-change rule: "If a Commander would be put into a library, hand, graveyard or exile from anywhere, its owner may choose to move it to the command zone instead."
So it's only in certain situations that you can move your commander to the command zone.