Yup, that's it. Even if the charger gets unbearably hot to touch(which it should) using it to prop up the laptop
The whole point of a cooling pad is that it should circulate air and if it blocks the vents on the laptop, the whole point of a cooling pad goes way.
This was the reason I made by own:
Laptop brands look for every reason to not give your the promised warranty and even if you have ADP they can write it as "Intentional Damage" and not accidental and completely refuse warranty on it.
Just for this reason getting any sort of small little laptop stand like these is shooting yourself in the foot:
