[tomjakubowski]

Definitely a stupid question, because I actually have no idea how they work: can a solar sail be "tacked" so as to decelerate towards the sun, like a sailboat sailing into the wind?

(Setting aside the risky problem of getting this waste off earth and into space to begin with)

[blackboxlogic]

Tacking works because boats have a second "sail" interacting with a second fluid moving differently than the wind (the keel is in the water). There's no second thing to push against in space.

If you "tack" your solar sail, you'll spin.

[hutzlibu]

I have not done any calculations now, but given how small the solar wind is in drag, it would have to be a very, very big sail.