Jigzyy,
Many applicants are considering anonymous views on LinkedIn conducted by VOs; it may be correct but I don't consider it positive move for the applicants. Because if VO officer has visited their profiles then he/she might be looking for mismatch only. It will become more critical if an applicant has created his/her profiles on multiple professional websites such as linkedin, monster, indeed, bayt etc.; in such case, finding a profile mismatch could become easy for VO.
I believe that if an applicant doesn't have such online profiles, his/her BG check must not take longer than normal because LVO has proper credible sources to conduct the BG checks. Such online profiles must be visited by VO to find only mismatch & if VO doesn't find any mismatch, it will add zero value to the applicant's file but if VO finds a mismatch, it can really destroy the application; this is my take on it.