Twitter appears newly intolerant of rapid checking for new posts

Just a note... 
While I test various accounts or problems, I often hit X-Notifier 'Check now' (or restart my browser)... which causes XN to check all accounts, and this appears to check Twitter too much in a short period of time, because I then see that Twitter stops being checked and upon clicking the account to sign in, I will be presented with a page informing me that the account has been locked for possible bad behavior.
- If this happens, then you have to verify that you're you/want it unlocked by clicking through a couple checks and entering a phone number or email to receive a code to enter to unlock your account.

Just FYI.