What are the best practices for using a GUID as a primary key, specifically regarding performance?

Question

I have an application that uses GUID as the Primary Key in almost all tables and I have read that there are issues about performance when using GUID as Primary Key. Honestly

Answer 1

Having sequential ID's makes it a LOT easier for a hacker or data miner to compromise your site and data. Keep that in mind when choosing a PK for a website.