In most Orthodox jurisdictions RCC folks are Chrismated into the church.
It is just as wrong from an RC perspective because chrismation/confirmation can't be repeated. The Russian practice, dating from the reign of Patriarch Nikon, was to receive Catholics by confession of faith.
I sort of disagree.
If you look at Re-Chrismation in terms of it being used when someone has left the faith for a time and returned it has a fairly long tradition in the church.
So if you look at it from the Orthodox perspective of someone being baptised into the true church but then following non-church teachings and leading a life away from the church then Re-Chrismating is historically the way they can return to the church. [Which we would find to be the case in the case of Catholics, the Orthodox do feel the Latins have added innovations to the faith and will probably do so until the schism is healed if ever]
(As to whether one can be sealed twice with the Holy Spirt, I don't have the theological background to even begin to ponder that... )
New Advent seems to push re-baptism in cases where it's unclear... (They mention conditional baptism which to me seems like a way to just skirt around the issue... )
There is this that I found on EWTN:
"Heretics and schismatics may not be confirmed unless they have
abjured their errors and been reconciled to the Church. "
http://www.ewtn.com/library/DOCTRINE/AGECONF.TXT