By way of example from the other side of the fence - my LinkedIn profile asks recruiters to state that they've read my pre-requisites for a role when they contact me. 90% don't do that (and clearly haven't).

The kind of recruiter that doesn't bother to read the candidate's profile is "phoning it in"

I delete all of those - the remaining recruiters are generally ok, though they're often offering roles that are trivially discoverable to anyone actively job hunting.