They will also clip walls, conveyor poles, and quite a few other things as well. I've got a fuel line for my truck stations which I split inside a 2 by 1 space so that I can send it on to the next station. That 2 by 1 space also contains the output / input of the truck station. If the splitter was incapable of clipping the wall a tiny bit, there is just no way that I would be able to split the fuel line within such a tiny space. It's already quite the rat's nest in there as it is. It does not show on the other side of the wall, so as far as I care, it's fine. In games like this, I do agree with you that limits must be imposed on what can be done, but past a certain point, if those limits are made too restrictive, you end up frustrating players and that's definitely not what you want to do. Maybe they could use a tiny bit of work, but as far as I care, they aren't too far off from the sweet spot they need to be in. As a player, you need to be able to set yourself limits on what you will do and won't do.