unless someone is being downright obnoxious and not singing way too loud. no harm. a lot of people like to sing along when going to a concert of a favorite artist. sounds a bit cruel to say only those who can actually sing can participate. it beats being stuck next to someone who is screaming at the top of their lungs. or someone who is drinking one beer after another and getting drunk{ been stuck with that one}

I don't think this would really matter because 8 out of 10 people will be doing the same thing.

No, it's what you're meant to do at a concert. The chances are no one can hear you anyway; you just add to the general chorus of people singing along.

To me it would be funny, but some people sing in the church and that normally makes my day because it sounds so funny.

Hmm I can't sing, and the only concerts I go to are rock concerts, where I doubt even if I do sing, people can hear me. Sorry, but you can't get into it, if you don't sing with them.

Guilty as charged!

i know i cant sing but i do anyway cuz it makes me feel good but thats usually in my car or at home but i would hope i would have enough common sense that i would not ruin someone elses concert by singing loud enough that it distracts from who we paid to see. now you noticed i didnt say i wouldnt sing

That doesn't make you classless, it makes you goofy and a schmuck!

It is human to want to sing. I dont fault someone who sings to sounds they love. But someone close to them should tell them they cannot sing just to save them the embarrassment. Being tone deaf does not mean you have no class.

If it is a concert, no one in the audience should be singing anyway. But if it is a church service, any singing with the right heart is pleasing to the Lord.

This is sorta annoying, but it is a concert, and most of the time the music and the rest of the crowd are a lot louder than the person singing off-key.

it's a CONCERT! sing!

Whether you can sing or not, people didn't pay to hear you