Glad you shared this experience as mine is very similar. I made an account successfully, I only used my account to follow artists I enjoyed, hours later I received an email notifying me that my account was deactivated and to reactivate it I would need to send them a picture of myself holding up a piece of paper with the ID code presented in the email.

I tried emailing back for more information as to why I was deactivated (since I did nothing wrong, unless following people without posting is wrong?) and all they could regurgitate was the shpeel that I had to send them a picture of myself with the code in order for them to help me.

Long story short, I will never use Instagram.