I've been using Pinterest for the past 3 months. I built a nice community and was pinning everyday (15-25 pins in a day). I was extremely careful not to spam, but I was using pinterest to drive traffic to my blog. I built a number of group board and was creating good relationship with other pinners. I had hundreds of people pinning into my group boards and almost 5000 followers. One day I've decided to verify my website in Pinterest (as the recommendation is to verify your website in Pinterest).
This was a big mistake: very short time after I verified my website in Pinterest, my account got deactivated. There was no warning from Pinterest and no specific reason.
They've just suddenly decided that I was a spammer. I believe that they've noticed that most of my pins are linked to my website and they didn't like it so they kicked me out.
But here is the big issue: Because of the association between my website and my account - my website got banned from Pinterest as well. Pinterest will not let you pin anything linked to my website and it blocks any existing links. Instead it shows a scary warning message saying that my website reported as a spammy website. This a complete lie !
I was extremely careful to follow the TOS of Pinterest : I've always pinned relevant pins to all the group boards and I've also pinned information that is not related to my website.
I've contacted Pinterest and all they did was to send me a generic reply that didn’t mention any reason. They've also sent me an automatic email asking me to provide them feedback about their level of service. I wrote a very detailed explanation about my situation and asked for answers but needless to say they didn't reply. I was asking them to provide an explanation why I didn't meet their TOS - but they didn't reply.
My lesson is: Never verify your website in pinterest (especially if you are Internet Marketer). You will get kicked out from Pinterest and your website will be banned.
You may be thinking that you are fine, but one day Pinterest will decide to “tweak” its “anti spam” script and you will be next. You will be kicked out and your website will be banned.
Note: I’ve updated this post to make it relevant for people who read it for the first time, based on all the wise and helpful comments I’ve received.