I got a pair for EDC after realizing the foam earplugs were ruining the music. These reduce the volume with minimal muffling. Also pretty cheap considering they'll last a long time.
I picked them up at guitar center - they can help you get the right ones.
That's how it started with my MC5's. I put a piece of heat shrink tubing over the fray in order to postpone their demise but ultimately the plastic housing of the driver itself broke. The HF5's one day just stopped working out of one ear. I was never particularly rough with them or anything and only really used them at the office, but that was it for me.
I since moved on to a pair of Sennheiser MM 550-Xs but stopped using them because there was Bluetooth interference in my office (every one of about 70 desks in an open plan has a Bluetooth phone headset). Plus, the band messed with my hair and scalp.
Now I'm on a pair of Sennheiser CX 686G SPORTS that I originally bought for running but now use at the office. Sound's good enough and the build quality is superb since it was designed to be tossed about while doing active stuff.
I would gladly go back to Etymotic if they came out with something new in the $100ish price range, but for now I'll stick with Sennheiser. I've bought probably 6 different pairs of headphones from Sennheiser of varying styles in the past decade or so, and they all still work (with varying degrees of wear and tear). The only time a pair has broken on me was because I stupidly tried putting them on after they spent a night in a below-freezing car and didn't give them time to warm up, snapping the plastic headband, and their warranty service still replaced them with no questions asked.
Went to a kids show, some disney tripe or other, volume was painful for me and made my youngest at the time cry ... movie theatres clearly have a thing about being loud but surely that doesn't help to make them a place anyone wants to be. Yes, I went out and spoke to someone and had the sound level lowered, it was still loud; I'm sure it was beyond the safe working volume set by Health & Safety Executive [UK] though. Amazed that it's not monitored and set automatically.
I started using them in the 90s rave scene in SF. I would go to a party and would always bring earplugs with me, extra ones and hand them out. Especially to people who appeared to have had... a little too much. Sometimes handing a plastic bag of earplugs to someone who has had too much is a great thing from them as it helps them center a bit more.
I personally think that all concert ticket windows should hand these out with each ticket purchase/pickup.
One time I got grabbed by a bunch of bouncers and forcibly expelled from the venue - they thought the purple earplugs were drugs. Once they realized they were super apologetic and we had a good laugh about it.
In general, if the performers are wearing them, you probably should be, too. Your health is not a good place to think about being worried about what other people aren't doing to protect theirs.