In their quest to copy Facebook's formula for professional networking, LI's growth/engagement team makes a huge effort in promoting users to endorse their connections.
As a result, nearly all the endorsements on my LI have come from non-technical folks who just know buzzwords (e.g. python was my most-endorsed skill even even though this isn't my most used language by far, and any engineer taking a quick glance at my projects -- almost all native C/C++/ObjC -- would realize it. Now I'm getting lots of pitches for python gigs...)
If there was a way to (optionally) approve an endorsement beforehand, that would help.