Allstate Platinum Protection Plan worth it?

When I was in my early 20's driving a slant 6 F body, I used Allstate. My insurance kept going up fast without any tickets or claims. I went in and asked them what was going on since there was no reason for the increases. The lady behind the desk was very kind and told me that she understood but there was nothing she could do for me. She did actually called other insurance companies on my behalf. She said please come back when I was 25. It's now 13 years since I turned 25 but I haven't come back. They need to realize that if they treat young people poorly just because they are young....they lost long term customers.