There are three kinds of microblogger:
1) people who treat their platform like an open forum where input from anyone is desired and welcome, at least in principle
2) people who treat their platform like a noisy cafe where they really just came to talk to their friends and consider it rude for strangers to interact other than supportively (and sometimes even then)
3) people who treat their platform as a vehicle to tell as many people as possible that they are wrong, directly