I have met several in person. 5-6 GM's 5-6 IM's, I even have a couple of wins over an IM. Most I have met at tournaments by asking for a picture with them.
Who Here Has Met a Titled Player?

my next door neighbor is named John Jones, PhD
yesterday, I had an appointment with a Dr. F. Williams.
I have met several people with titles.
my uncle is a names Henry Singleton, CPA
he is a good accountant

I have been blessed to meet 2 former world champions:
Boris Spassky, and Max Euwe
Ive met and played Walter Browne
Met George Koltanowski
Met...hung out with Jesse Krai

I go to UTD, they tend to get a lot of FM, WM, GMs and IMs
I'm friends with Grandmaster Julio Sadorra
Run into these guys several time during chess club:
Grandmaster Conrad Holts
National Candidate Master - Courtney Jameson
Woman Fide Master - Saheli Nath
Lots of Class B and C players also.

One year I played 22 games. 11 with non titled [won all 11]
6 game match with a USCF master 4 draws 1 loss 1 win
2 draws with two other USCF masters
1 loss to a USCF master
1 win vs one other USCF master
1 win vs a USCF grandmaster

I've met Anatoly Karpov & Susan Polgar & Larry Evans, etc. etc...
I've also seen a lot of them at tournaments when I lived in Las Vegas.

Gary Kasparov is my third generation cousin. I've meet him a few times at family reunions, although he is a distant relative.

my next door neighbor is named John Jones, PhD
yesterday, I had an appointment with a Dr. F. Williams.
I have met several people with titles.
my uncle is a names Henry Singleton, CPA
he is a good accountant
There's a clown in every bunch .

oh you were talking about titled chess players
i have seen a bunch of Gms in real life
they are all just regular people who can just play chess really well
why are you putting titled people on a pedestal?

The toughest " killer's row " I ever faced was a rapid event in Lisbon Portugal . After winning my first 3 games I then faced 6 fide titled players in a row : 4 IMs , 1 GM and 1 FM . I played another event in which I played 4 GMs , out of 9 games . In 25 years of tourney chess in the USA I played 4 GMs total . While living in Portugal I met Spassky , Karpov and Kasparov and was most impressed by Spassky and least impressed by Kasparov and Karpov was in the middle . Spassky is a far nicer human being than either of the other 2 .

Lucky you, Spassky will be always one of the all-time chess heroes, because of play and personality.
I've faced GM Romero Holmes and FM Sergio Sánchez in simuls (being crushed in both cases) and IM Javier Moreno Ruiz (currently GM if I'm not wrong) and other IM wich name I don't remember (but I remember he looked like a bald Tarrasch) in a tournament. Here in chess.com I've met IM pfren and especially FM nobodyreally, who honoured me with his friendship.

I studied at the University of Helsinki and became good friends with IM Mikael Agopov (current FIDE rating 2433), who went on to become the chess champion of Finland in 2011. The other students and I had a small chess club going, but he would never play against the rest of us because playing against far inferior players might damage his play - except blindfolded. The day I met him, he was playing blind against another friend of mine sitting at the other end of a long table, all the while doing his theoretical physics exercises.
My fondest chess memory is getting drunk with him at his apartment. At one point, somebody suggested a blindfold game, and Mikael went to lie under his bed and called the moves from there. I played against him and could hold my own pretty well, until he suddenly said "Why didn't I see that before?" and went on to decimate me in about ten moves from what I thought was an even position. After that, we've sometimes analyzed some games together, and I've shown him some of my best games here on chess.com and he's been (mildly) impressed.
Who here on chess.com has met or played a titled player online or OTB?