All the CM's that had lanyards were friendly, mostly. However, quite a bit wanted to pick their own pins, one even threw a fit because I gave her a small one and told me that I needed to give her my big one. Basically, either have 2 lanyards( one for trade and 1 for show) or do not wear the ones that you like. I ended up putting my traders on the back of my lanyard, and the ones I like on the front of my lanyard to make it easy. My husband just carried a little trader bag thing and used those ones.
Other CM's did not care. We had great luck at our hotel, as one CM loved Stitch and my husband collects all stitch. They traded pins from her personal collection because she loved one of my husbands so much.
Ooh! My husband collects Stitch pins- which hotel were you in?? Thanks
Most of the stores have a good selection. The pins must have a Mickey head back, and cannot be bent in any way. They also check for the "fake" pins. Not exactly sure how though. We always carry a magnet with us, most fake pins will stick to the magnet, real pins will not.