>you get kind of immunized.
Herd immunisation (AKA the smart cow problem reversed).
https://en.wikipedia.org/wiki/Smart_cow_problem
Now for tips on counter-shill tactics:
1) Emotions/emotional arguments imply by default they don't have sound facts or logic to back it up.
2) When shills do finally present evidence(?), it classically has the following flaws (any/all/some):
2a) The source they're using is bias (and is not factually accurate)
2b) The source uses factually correct information, but skewers it through a perception filter or lense that eclipses a serious issue (for example, one person posted the DoJ admitted no-one got arrested for terrorism, tried to claim Trump was lying - which eclipses the fact the media has endlessly reported on terrorism and terrorists being arrested etc so more a damning refutement to their own position).
2c) The source uses opinion but the arguer tries to use it as fact (appeal to authority fallacy)
2d) They source 'clean' facts but the facts have been cherry picked (EG ignore other facts that change the context, only focus on one side, cherry quotes only specific parts etc)
2e) The source has a credibility problem or tries to use dishonest arguing tactics themselves (EG snopes)
2f) The source makes claims that simply aren't substantiated by any citations (typically done by mainstream media, for example, when 'debunking' PizzaGate they make circular self-references to each other that don't lead to any substantial refutement - three men make a tiger fallacy)
3) When arguing, the shills goal isn't to win you over, but the fabled 'audience' (EG the silent majority). You'll sometimes see me address the audience directly by using third-person pronouns and references ('see how this shill can't even get his facts right?') in order to counter it.
4) Shills will try to provoke, traumatise, infuriate, rely on semantics or pedantry. Always call this out, and never engage ('that's an argument to semantics, which I'm going to ignore').
5) When you get a 'direct hit' on a flaw in a shill's argument, they've been taught to ignore it and not respond (which is why they never requote your posts unless your response is garbage).
This is called 'minimisation', their goal is to make your counter argument have the least amount of exposure. You can thwart this by re-referring to their sidestepping of your argument in subsequent posts ('why won't you answer me on…').
The more desperately they cherry pick your post's quotes, the closer you are to a winning argument. If you do it right, you can force them into a 'non-reply' state (because quoting any part results in them being beaten).
6) Shills want you to look bad (same tactics Media Matters did at the Trump rallies), so they try to provoke and then capture you at your worst. Don't rise to the occasion, and call out any and all abuse (ask questions why they're doing it).
7) Don't give them any personal information, don't try to 'prove' yourself to them (or if you do, give them bogus info), because the shills datamine and then use it to attack you by looking for personal weaknesses. Your sex life, age, financial status, colour, whether or not you're disabled, etc (yes, a Democrat organisation does use such slurs) will all be used to harass you. It's always worth bearing in mind the shill has a shitty job and doesn't contribute to the human race in any meaningful way, and worth reminding them of that any time they get abusive.