Depends on the type of laptop and how much you love it/if you plan to ever sell it.
Personally, I tend to put stickers of work hardware I buy along the way on mine 🙂
I work about 10+ hours a day on mine, and I have a razer and oculus sticker on my MSI laptop I use for work every day and they still stick as good as ever a year later.
Basically it comes down to, if you need to sell the computer later, then I’d advise against it.
OR maybe if you have a laptop that runs really hot, I’m sure theres a potential for cheap stickers to fall off. But you should be fine.
Otherwise, stick away if you feel so inclined (and you own the stickers and laptop). 😉
(EDIT: Definitely do NOT cover any ports or fans with your stickers. Generally the rear of the screen is the best place.)