There are prob more real service members that embellish or straight up lie about their service and achievements/experiences than there are straight up posers who never served.
Found out a guy who I was the best of friends with was doing this. Nothing but facebook posts about being a SAPPER. We were 62H... Concrete and Asphalt guys. Dude did 21 years and did absolutely nothing, unless he was a good recruiter for his last 13 years. Lied to everybody who would listen as long as they would listen. 5 deployments PTSD, Purple Heart, Saved a guys life by pinching off his artery so he wouldn't bleed out ...YADDA YADDA YADDA. Was the biggest COWARD and obvious liar I ever met. Was afraid to leave base camp in El Salvador in 95 AND 96 and did absolutely NOTHING in Bosnia except replace the regular NCO on a mail run ONCE in 97. So if you ever run into SFC Lewis Cheatwood, believe absolutely NOTHING he says.