I'll agree with the others that have stated that we need to read the rules and work off what we read there using good common sense. Declarations of "Well I haven't read the rules, but this is how it should be." Aren't particularly helpful, as they add zero additional data to the discussion. Presumably, the people who can declare opinions like that that actually matter are the members of the GDC. One would hope they have in fact read the rules.
Back on topic, The GDC has
said that all robots are assumed to have CROSSED lane markers at the start of the match, and thus will still be penalized for anti-crossing them. So there's a little guidance out there saying that robots are already considered to have crossed lines at the start of a match. There isn't any guidance as to which other lines and in what order, but it could presumably give the GDC an out to simply state that a robot is considered to have already CROSSED its own finish line at the start of the match.