Robot Defence/Blocking

[VEX_GDC]

However, let’s say that team A could not get out of the 10 point zone, and lost the match because of that reason. Would team B be disqualified, considering that it was match affecting?

This topic is very situational and context-sensitive. Please see the following posts and the Q&A Summary Document for more information:

Answered: Blocking Opponents from Entering Zones

Answered: Pushed into opponents 10 point Bar

Or will there be no disqualification, since the Game manual says that robots can do whatever they want to a robot playing rough defence?

This is incorrect. The April 5th update specifically refers to robots which are encompassing or interacting with opposing Mobile Goals, not just robots which are playing rough defense.

While team B was pushing team A, all of team A’s cones got knocked over. Will team B be disqualified for knocking over cones or not, since team A was playing defence?

Team B would likely be in violation of SG5 for knocking over Team A’s stack, regardless of if they were playing defense or not.