The first one tickles me. I have enjoyed the role of introvert in that scenario numerous times.

I just had that happen to me last night. I went to a very small local outdoor concert. Staked out the place and found a tiny little uninhabited grassy hill under a tree away from all the people. Sat down, got situated, and along comes a noisy group of six who parked themselves right next to me. I packed up and moved. Solitude is hard to find out there

Good ones! I’m very expressive so I’m sure that’s exactly how I look. Also I appreciate the first one because I have seen it done or with just simple and minimal conversation, just enough to let the introverted person know they are appreciated and can walk away safely without feeling like anyone was rude or offended.

Oh yeah, that's the look!

Actually I'd rather sit next to a horse than a person....LOL

I like to sit at a vantage point to view the room and not be bothered

OMG! Freakin' hilarious! I completely relate to the second one! (But not opposed to someone saying hello...?)