"Once you win 50 times the league I let you to use my team emblem" - Joking
This is not a new idea but also is not as easy as it looks, just as you see above there are some emblems in-game that already have a stars above them and adding more stars on top of other stars will look silly.
Maybe an option that will allow you to display the stars only if you want might be more practical. The problem is also not everyone might like this idea so you will have some people who like and some people who don't.