The short answer is no, absolutely not. You should be making a deliberate decision about who you invite into your social graph. Ideally, these will be people yo

The short answer is no, absolutely not. You should be making a deliberate decision about who you invite into your social graph. Ideally, these will be people you respect and admire, but it's fine to have people with whom you only had a typical decent working relationship. Do not, under any circumstances, connect with people who did not treat you with dignity and respect. For one reason, you don't want them badmouthing you behind your back if a recruiter goes to them for a reference. More importantly, the people you highlight in LinkedIn also represent a vision of how you would create your future professional life. Choose people you would work with again, not people that were a blight on your existence.