Good question. Some do stretch things here and there and you will see list categories like "worn/carried."
IMHO, you should start with just a basic clothing kit for the "worn" category: base layer shirt, pants, briefs, socks and shoes. I think putting a lot of stuff in your pockets and leaving it off the base weight is just playing games.
Things like trekking poles aren't generally counted for base weight, but you know if your poles are heavy or light ones; likewise shoes/boots. They come back in the skin-out weight.
Consumables aren't counted in base weights, but the containers are. Again, they come out in the skin-out weight, and can really up the weight. Water really stacks up, and it is so dependent on climate, season and personal metabolism. I've seen a few lists critiqued on carrying too much water or too many containers.
The whole idea is to get a basis for comparison. It isn't a competition, but rather a means to help one another get over concepts and techniques that make for heavier kits.