Good to know, I also noticed these aren't just images, but solid objects. I'm doing a bit of a "hide and seek" type thing in my save. I only have the intimacy stat and dating content left to raise and on multiple girls, so what I do is wait until the time bar reaches about half way, then go to the girl with the highest intimacy below max after a slow count to 30 with one count every two tambourine hits in the usual in school music to give everyone a chance to get in a date request. In that time, a girl usually comes to me and it usually ends in lunch. Once I regain control, I usually run around in whatever area they take me to for lunch and, ever since the Mob Adder mod was added, I've had to alter my running pattern to avoid them. I ran circles around the benches on the roof before it was added, but a group of them is always in the way of running a tight circle. That's how I found out because I ran right into them the first time I played when they were in. I'm not sure if changing their color will affect their solid state or not, so they may or may not just become an invisible wall depending on how the mod reacts.