Here is a picture of the archer situation around Rheims:
The archer heading east could be at T92? In one more turn, he could hit the road and be very close to our workers by T94. If he gets to the hill, it will be very hard for our chariots to get him.
With all of the fallout between our chariots and Pigs, it will be hard for us to run him down before he disrupts our plans.
De Gaulle only has one archer within striking distance of his worker, so no matter what, we will end up with an extra worker.
So, do we want to play cat and mouse with De Gaulle's archer? We should be able to make up any time lost with our pigs workers with the addition of a "free" worker. The question is, how long will cat and mouse last and how long will it be to get back on track.
Another advantage of worker stealing is that is slows De Gaulle down.
T94 is the turn that worker 3 was to scrub the plains hill, so we will see De Gaulle's archer if he did not go to the hill. The worker can then bail to 1S of the bananas.
EDIT: How bad could De Gaulle hurt us if he has a galley and unloads troops near Fish?
EDIT 2: We build workers in 2 turns in Moscow.
I can go either way.