Possible Clues:

• Many a comment from Donald Trump
• Affectedly pretty type's first to use social medium
• Communication with hashtags
• Message with a hashtag, often
• People in general blocking an offensive brief message
• Communicate with 'followers'
• Message conforming to a 140-character limit
• Message that might start with '@'
• Noise from a nest
• Sound from an 18 Down