Well, actually I've long held the view that accusations of astroturfing, shilling, being a Chinese/Russian/CIA/MAGA/Soros/Martian bot, etc, are just people being too lazy to take on arguments they dislike with well-reasoned arguments of their own, but needing some sort of a quick "exit strategy" out of a conversation. Maybe this isn't true on Facebook, but here or on Reddit it is always far more likely that you're talking to an actual, possibly very wrong/bad, human being.

What is perfectly reasonable and rational is to only respond to clearly written arguments with some evidence of thought and time invested in them, and to consider others to be too low-effort or spammy to invest time in responding to. But guess what? Real humans spam for free, they're mostly not paid to do so by the PRC or George Soros.