It’s an occupational hazard for hosiery to ladder. It’s just something that happens. The strategies to stop laddering, in my opinion, don’t work. The tights will carry on laddering. Everyone has experienced it so my advice regarding ladders is to ignore them. I try to get at least one days wear out of my tights and nothing is worse than a finger through your nylons before you’ve even got one leg on. I just carefully pull the other on and go to work. From lots of angles, the tights will look fine. Hopefully, a big part of the morning will have passed before anyone notices the ladder that has quadrupled in length, especially after a toilet break.