Yes, absolutely, 100% ban. Learned from experience.
Used 100 Accounts. Hooked them all up to twitterfeed. Used 8 different URL shorteners. Used about 15 different suffixes and prefixes. Used all of the different times so that they would be scattered throught the day.
Just 1 blog post is all it took and the next day all accounts banned. Most of my other tweets were normal tweets with no links, no hashtags. So it wasn't because all of my tweets contained links. Approx 1 out of 5 of my tweets contain a link.
I did this 3 times before I figured out that Twitterfeed was the problem. Went through 300 accounts because of twitterfeed posting across many accounts.
Save yourself a lot of time and frustration and don't even consider using Twitterfeed to post across all of your accounts.