I'll call these people the "definite maybe-ers" because, they have a hard time prioritizing and organizing, so instead of saying "yes" or "no" they say "maybe". I have a feeling that I am not the only one to deal with this dilemma, so while it may seem that I am ranting, or complaining or whatever, I'm just trying to point out a trend that people can relate to. A trend that makes no sense for anyone.
Let me give some stark examples.
If you are invited to a wedding reception, or a wedding, more often than not (and by that I mean every time) you are asked to RSVP. I have never heard of someone RSVPing "maybe" to someone's wedding. It's just not practical. The couple cannot just spend an inordinate amount of money of tables and food for people who may or may not come. They need to know definitively. So, if I ever heard a "maybe" for my wedding or reception, I would take it as a "no", and, a slap in the face because the person could not deign me with an appropriate response. If I got that response, the person would most likely not remain a friend. Now, bear in mind a "no" is far more polite and I would not feel burned at all.
But here's where the problem comes from: Many people want to seem polite, or be "nice", so they do not give definitive answers and waffle out of fear of offending the other party. Well, the reality is, being clear and saying "yes" or "no" is not a mean way of interacting. It is honest, true, appreciated, and "nice". There is no need for ambiguity. Ambiguity makes things awkward for the "definitely maybe-er" and the person being "maybe-ed". So, the solution is directness.
Another example would be if you're asking someone out on a date. Especially if the date is something that needed to be planned out in advance, like a concert or a nice restaurant. If the person being asked says "maybe", I would move on. It's not polite. How hard is it to pull out your planner, look at your schedule and either see if you're free or not? It's not. Now, if you are a "definitely maybe-er" you might have a bunch of "maybes" already penciled in, and that would cause you once more to say "maybe". Living life like that is ludicrous. Give a guy or gal a "yes" or "no".
If you truly don't know if you can manage something, there is a polite way to deal with it. You do not respond until you know for sure. "Maybe" cannot suffice. Neither can a "yes" that turns to a "no" or a "no" that turns to a "yes". I hope I'm preaching to the choir on this. What do you think?