[Jon Stratis]

The nice thing about bag and tag is that it helps teams avoid mistakes. When the robot is in the bag, everyone knows they can't work on it. If you take that physical barrier away, we'll have all sorts of teams that had someone (like a freshman not familiar with the rules) get to the shop early and do work without someone watching them to say stop.

Plus, you'll have variations in scale calibration - we'll likely get different readings for every single robot when we weigh at competition, which would be a nightmare to try and untangle.

As it is, you can already remove your robot from the bag for promotional opportunities, which pretty much covers what the OP would be doing. The only difference here is that you could also practice with it, which increases the chance of something breaking without giving you the chance to fix it.