I know that if something was completely safe, there would studies to prove it and with sufficient evidence, people wouldn't be "complaining incessantly."
There are many, many studies showing that the risk of major injury from vaccination is extremely minimal (typically less than one in a million) vs. the risk of major injury or death due to infectious disease (anywhere from 1-30%, depending on the type of infection). There are already many MANY MANY studies to prove it: 157 of them in
PubMed (online database of scientific studies). The overwhelming majority of those studies show that since mercury has been eliminated from vaccines, diagnoses are still on the rise, regardless.
People do complain about things that are completely safe, all the time. And about things which are just not to their liking. And about things which they read about on the internet somewhere. People complain when their doctors tell them to eat more vegetables and get more exercise--perfectly safe, good advice for them, but they don't want to so they won't. Diabetics complain about how often they have to test their blood sugar, because fingersticks hurt, even though fingersticks are safe and absolutely necessary for them to stay healthy. Heart disease patients complain when they're told to cut their sodium intake and lay off the deep-fried Snickers bars. Teenagers complain when they're told that doing you-know-what is a great way to catch diseases. Utilities departments complain when the public health officers tell them they need to install better filters so they can filter E. coli and mercury out of the drinking water!
(You did know that the vast majority of mercury exposure is from drinking water, right? And that it got there from coal-burning power plants? Yet no one seems too interested in shutting down coal-burning power plants. Why, do you think?)
Now, granted, modern medicine really needs to work on issues like patient compliance, that is, they need to figure out ways to get patients to complain less and follow their prescriptions as they're given. Patients don't like being told, "Sorry, there's nothing we can do for you," or "The medicine we will have to prescribe to cure this disease can possibly have some nasty side effects" or "You're going to have to stop eating beer-battered bologna sandwiches and Velveeta shells-n-cheese." Or even, "Take this medication three times daily for exactly ten days, no more no less." Modern medicine seems to do that sort of thing very poorly, judging by results.