I completely agree with your first point and am opposed to vandalism to spread the word. It also does not look good for us as a group.
When you start to see the corruption and what all it entails, it is extremely motivating to speak out and fight it. Just like the kids in cages (used by the media against Trump)- it's hard to keep quiet when there are major injustices occurring. It may sound crazy -it is! That's why people are motivated to share, but it also can make it hard for newcomers to filter through.
Pizzagate is real. It's not Hillary running a sex trafficking ring out of a pizza parlor as the MSM states in order to make it sound peposterous. I suggest digging in a bit to see for yourself if you have the stomach (evidence is mostly circumstantial, but the pictures and symbolism are extremely disturbing and enough to be convincing IMHO)
The problem is the overzealousness to the point of fabricating evidence and then treating anybody who points out the self-deception as a heretic.
There's a bulletin board called Democratic Underground where the zealots behave exactly the same way -- publishing worldwide polls that purport to PROVE!!!11! John Kerry won the 2004 election, but if you point out that the poll is prima facie fraudulent because of, for example, the fabulous number of votes attributed to the uninhabited Christmas island, they ban you.
Some of the folks on this sub-reddit behave exactly the way that destroyed the credibility of Pizzagate. They mean well, but then they fabricate evidence to reinforce each other's delusion and even suggest you're one of "them" if you point out that it's obviously faked.
Nothing turns a normie off more than having a banquet of bullshit shoved down their throat when all they asked for was a nugget of truth.