Answered: Field Damage and <G11>a.

<G11>a says:

If an offensive robot attempts to bypass a wallbot (for example, by tipping and pulling it), and the field is damaged in the process (for example, the wallbot’s axles gouge slits into the foam tiles), which robot will be at fault?

This situation is highly context dependent and as such we cannot provide a blanket ruling. The referees who can see the entire specific scenario, not just a snapshot, will make a ruling if this were to occur.