I just used temp-number.com to receive a verification code (no cell towers where I live). I was shocked to see that someone had sent their Bitcoin wallet info to the service.

I got their username, password and verification code. Their account is worth over 60BTC. That's over $2,000,000.

No I did not steal from them, but holy cow I can't believe how incredibly stupid that is.

So be mindful when using these, they're fully open to the public to read.