Not at all what they announced according to the linked article. It's quite literally the opposite really, do you read French or did you Google translate? 'action de masse' roughly mean assembling somewhere to disrupt anything with a mass of people, to many to get arrested. If they wanted to stop a train, they would have invaded a train station (or multiple ones).

The first article is about disturbing the olympic torch relay, and the second one is about various protests, e.g. against a freeway and a logistics center. Nothing about trains.

No the announcements referenced in the article are not about sabotages.