There is a risk in inviting people to review your business on social media. It is easy for a competitor or someone else who wants to damage your reputation to rate your down with a false review. It can be tough to recover from.
Since there is usually no verification mechanism for a review on, for example, Facebook, I think it is best to turn off the review option, thereby removing the opportunities for those who want to harm your business.
The opposite is true too. I have seen new businesses with hundreds of positive reviews within a day or two of opening. I doubt the accuracy of the reviews.