It's unlikely they will actually damage your MacBook Pro by delivering too much power to it. But there are many cautionary tales to be found on the internet of 3rd party chargers overheating, and occasionally catching fire or exploding. Technically, using non-Apple components without Apple's written permission may also void your warranty if anything did go wrong.

Personally, I wouldn't risk it.

It's unlikely they will actually damage your MacBook Pro by delivering too much power to it. But there are many cautionary tales to be found on the internet of third party chargers overheating, and occasionally catching fire or exploding. Technically, using a non-Apple charger without Apple's written permission may also void your warranty if anything did go wrong.

Personally, I wouldn't risk it.