To quote your post signature "It's only illegal if you get caught." Well... I did get caught.
Backstory here is that I never had permission to enter those areas of Union and take photographs. It turns out that somebody who is (or was.. *cough, cough* Carillion) employed on this project also browsed UT and reported my posts to the authorities. As such the City of Toronto and Toronto Police asked me to remove them. I was trespassed from 65 Front St W for one year and threatened with B&E so I decided to comply with their request.
However, it has now been over two years and no criminal charges and no civil lawsuit have materialized. In light of this is there anything specific you want to see reposted? I still have over 300 photographs of the Bay Concourse mid-demolition, the Union steam tunnels, the underground loading docks, and the areas below the York concourse and below VIA during mid- mechanical fit out.
Here is a small teaser clip. This video was taken at the crossing point of the main E/W and N/S corridors in the new lower level of Union. The video starts with a view looking down the corridor directly South towards the new stairs which will lead up to Union Square and Scotiabank Arena. The view then rotates 360 degrees turning first to face East, then North, and then West toward the new food court which is below the York Concourse. Given that this video was taken in 2016 things have likely progressed significantly since then. The cinder block knock-out wall which is seen in the East view has likely been removed allowing direct access to the lower level under the new Bay Concourse. Also in the North view you can see the rebar sticking up from the ground which is the foundation for the new stairs which will lead up to the promenade level. These stairs will emerge from the lower level on to the promenade in between the dual small ramps which go to VIA (one level below the main ramp from VIA up to the Great Hall) and will essentially complete the main N/S corridor allowing a person to walk directly north from Union Square to Front St in a relatively straight line albeit with some changes in elevation.