I own a site that gives me access to thousands of people's twitter account user/passwords. My original thought was to mass tweet 1-2 times a day from these people's accounts since they agreed to that when they signed up. Unfortunately twitter is cracking down and forcing those that have the tweets on their accounts to change their passwords. Would it be a safer approach to send Direct Messages to people's followers rather than tweet? Does anyone have any experience sending mass direct messages? Wondering how many is too many and if anyone has used this tactic. If so how many have you sent and were there any negatives?