I'm going to listen to my ipod while I go shopping
Why would you choose to listen to your ipod?
Because I enjoy listening to it more than listening to other people.
I can respect that, people can be annoying sometimes.  You should feel free to listen to music while out running errands.
I am just worried. I don't want to disrespect anyone.
Don't worry, it is okay to listen to music if you want while you do other things. People will be able to see the headphones and know not to bother you.