My impression is that the main point of meets is to meet up with other members. Whether your car is modified or not doesn't matter. Might be bog-standard or might be massively modded, or anything in between.
As Aido said the trouble is you might well see something on someone else's car that makes you want to do the same to yours, so it can be expensive ! :D
In the small number of meets that I've been to so far, I've certainly not found anything other than friendly Lexus-owning (or Lexus-liking) folk. I've certainly never seen any kind of competitive element in terms of someone making out that their car is better than yours, or anything like that.
A great way to put some faces to names, as you say, find out who is behind that keyboard !