Question

I felt really guilty about 3 days after I took some kid's account.

If I don't know them, no of course not, it's their problem that they didn't secure their account well enough

Not really I ewhore and If I don't take their money someone else will. Also If they were in your position they would take it no doubt.

Naaaah... i feel good that i finally got a hit... that's a really good feeling.. every cracker will agree

I only feel bad if I watch them struggle to get it back.
Using other peoples Spotify as they fuck with your volume or change the song. They should have used a better password, or not reuse them on other sites.

LastPass and other things are free. Use em.

Not really. I grew up in a dog eat dog environment where your either the person that fucks someone over, or your the one getting fucked over.