The term 'KIND OF BLOCKER' can be solved by two crossword solutions: SPAM and BETA. SPAM is an acronym for 'Stupid Pointless Annoying Messages' and is a type of unsolicited email that is sent in bulk to large numbers of recipients. BETA is an acronym for 'Binary Experimental Test Assembly' and is a version of software or hardware that is released to the public for testing purposes before the final version is released.