I would have probably said something to a CM nearby. That bothers me, as a mother with two preschoolers. Yikes.
Yes, I think this kind of thing needs to be brought to Disney's attention, via CMs. Nothing will change if people who notice it do not challenge it. I am sure it wasn't deliberate on Disney's part, but they probably do not put a lot of thought into that kind of thing. If they know that it is important to guests I think they would make an effort to eliminate unhappy guests by monitoring it. They probably do not even have a policy on music played near attractions regarding lyrics, but maybe if enough guests make their feelings know, a policy can be put in place and implemented to ensure positive guest experience.

I'm going to agree that that was a poor choice in music! And as PP mentions, I prefer Disney music at WDW. Even at non-Disney parks I prefer instrumental background music. Feels more vacationy than what I can hear if I just turn on the radio.

But I really don't think that songs with inappropriate lyrics have a place in Disney. AAAAAAHHHHH...I've become Tipper Gore!!!
Actually, he completely rewrote that entire song with his own words. It is really pretty amazing. As for the dance party, they probably shouldn't have played it, but no one was held captive in the building. If they play a song you don't like, take your kid out for a break. It gets hot in there anyway. We take breaks all of the time. We've been going to that dance party for years. They always play a mix of kid songs and current songs. That is nothing new. They played I'm Sexy and I Know It at the Toy Story dance party a couple of years ago at
Unless the kids would like to do the waltz or something. 