Duplicate Detection - Match on URL

What are your thoughts on adding linkedin url as a dup check option. Not sure how it works  when looking at public vs  linkedin recruiter profiles (as they have different links)   -  but  it would be a great way to help reduce  duplicate entries.

From Merged Post:

Add LinkedIn Link to Duplicate Detection for contacts

We would really like the abillity to setup LinkedIn links as one of the qualifiers in the duplicate detection settings for contacts.