McTeague: Our comments make some difference with our legislators. They in turn have some influence on National matters. Even in a large crowd, individual voices can be made out.
People are paid to sift through news media, so our leadership can gain a sense of public sentiment. Someone, working for some agency perhaps, may possibly be reading your words right now. You're not as insignificant as one could infer from your postings.
It's not just Trump that can be affected by public sentiment. Every lesser elected and/or appointed official is susceptible to our collective pressure. They certainly have a more direct influence, but that influence is derived from us.
When 10 commentators combine their efforts on a single thread, the readers usually infer that they have colluded together, to give weight to their words. Mass mailings/e-mails have that same design. They are automatically discounted for being the "spam" that they are. Those 10 out of the 12 posters were discounted as such.