No one ever said anything specifically about BWI, at least I don't think so. Every single gate agent, at every airport, is capable of making a last minute decision to not allow family boarding. It may not happen very often at BWI but it can! It happens at the really big airports. If you're heading home from your fun trip to WDW, and there are 25 other families doing the same thing? You may not be able to get family boarding. Why? Simply not doable. They may allow one parent per child or just say no family boarding. If I had paid addlt for EBCI, and got a B2 slot, and I saw 50 people waiting to do family boarding?? I wouldn't be so happy!! Doesn't happen often, but it can!
Buy EBCI, and then forget about it. It's a cost of doing business with SW. Those that are flying alone or as a couple usually don't need to worry about EBCI. But I still get it as a convenience for the end of my trip. It's just not a ton of money for a little peace of mind.
I am a parent...of three. I've been flying with my youngest (now almost 20) since she was 3. I took the responsibility of booking the airline that suited my needs. I didn't book and then 'hope' that someone would enable me to be seated with my child if we weren't able to find seats together!! I have flown on Delta and had them cancel my flight. Because I had decided to take my dd with me a few months after I booked my airfare, she was on a different itinerary...at the age of 9. Delta put us on two different flights when they cancelled our flight!!! Good thing I was responsible and kept checking on the flight as we got closer to departure. This all happened about a month prior to travel! Talked to Delta, and they put us both on a different flight that actually worked better than the original flight.
Stuff happens...everyday. If you want to save some money and fly on SW, then you need to do whatever you can do to enable your family being seated together! It is not up to the kindness of others to make this happen for you. The whole saving of seats is a touchy subject here. I can't figure out why people think it's okay for them to save seats for multiple people in their group. Saving one or two seats isn't a huge deal but when you have a family group start saving more seats than that, you are going to have other passengers get annoyed!!
And that whole thing about someone paying for EBCI but not wanting to give that seat up to someone who really needs it? Seriously? I'm in the seat I chose for a reason. If I chose an aisle or window seat, I am not going to move into a middle seat so you can be seated with your child! Sorry, but it's not going to happen. I have offered to move for families before. I have seen very large family groups boarding late in the process and seem to have absolutely no clue what is happening. English didn't seem to be their native language! I had a row all to myself, so offered to move. The FA thanked me and told me they were moving some around in the back of the plane to accommodate the family. I did end up with someone sitting in the aisle seat in my row. So, I get it, I really do. You all just need to understand that sometimes there are reasons people aren't going to jump up and hand over their seats. If I paid addtl for my seat? Nope, not moving. I know that when I paid full fare for my SW seats, I have people stop and ask if my dd and I would consider moving so they could be seated together!!! Seriously? I paid well over $350 for my seat and you paid $99, and you want me to move so you and your child can sit up front? I don't think so. Sorry.
This is an argument that constantly crops up. If you have to be seated with someone specific, then you need to do what you need to do to get that done. If that means paying for EBCI, then so be it. Will that get you seats together? Maybe not, but it will put you in better position! If you have those that can board in family boarding, terrific. I would just let one parent and one child check in at the 24 hr window if they qualify for family boarding. that way, at least they'll be together if something happens to not allow family boarding. If others in the family have paid for EBCI, and are able to save a seat in their row, fine. When the rest of the family boards they can move around within those rows and get people seated next to the right person. But saving more than one seat per row is somewhat rude.