[piytar]

LOL.

Here is just one example of what could go wrong:

An artificial magnetic device capable of protecting Mars from solar winds etc. may disrupt the magnetic field of Earth that protects all life here from solar winds and other radiation. The disruption would be at a maximum when Earth and Mars are in conjunction (i.e., aligned). Then we get baked.

IOW, it could kill us all.

[Oztrich Boy]

An artificial magnetic device capable of protecting Mars from solar winds etc. may disrupt the magnetic field of Earth that protects all life here from solar winds and other radiation. The disruption would be at a maximum when Earth and Mars are in conjunction (i.e., aligned). Then we get baked.

Not really. Reading the article, the shield would be at the Sun-Mars LaGrange1 point 1 million Km from Mars and more than 70 Million from Earth at the closest. Disruption to Earth's magnetic field would be miniscule - and downstream with respect to the solar wind.

[freefdny]

They could also drop rocks on us from Mars.