Just thought I'd share an experience I had this weekend with all of you.
FI, my parents (who are financially hosting), and I attended the final details meeting at our venue on Sunday. We're having both our ceremony and reception there and they provide food and beverages, so there were a lot of things to discuss.
At one point, I mentioned that I'd like to move the ceremony indoors if it's too hot that day. The venue can accommodate that because that's the plan in case of rain. The ceremony would just be held in the reception area. We have quite a few older guests and very little shade in the ceremony space, and I want everyone to be comfortable. When I explained this, the coordinator said, verbatim, "Don't worry about other people. It's YOUR day and your guests should be grateful that they even received an invitation. Don't ruin your day just because you're worried about them. Worry about yourself and your happiness!" I wanted to punch her, but kept my composure and explained that I would, in fact, move the wedding indoors if I felt the comfort of my guests was at risk.
Later on in the meeting, FI and I asked her what time we should do table visits (no receiving line for us). She told us not to worry about it, saying that it was the guests' job to come to us if they wanted to say hello. O_o
For any lurkers on here (or anyone "on the fence" about etiquette), please don't let the rudeness of others convince you that etiquette and good manners aren't important. It is your responsibility to properly host your guests, and that includes making sure they're comfortable and that you take the time to greet them. I've learned so much on this board; listen to the advice these ladies/gentlemen have to give.