Pickup community begun purely through the group channels of the time, where each one tested different techniques and theories and writing about later, so everyone could get help or even try those theories, and with their feedback, people could tell if this technique worked or needed correction on some details.
Later, the Mass Media gave great publicity to the community, and so you were seeing each instructor popping up at magazines and TV shows as the new Messiahs who came to earth to save the beta males from their misery.
Ok, not all PUAs are "Messiahs"...
When I started to learn Pickup, I had some bad times in my efforts to find friends to support me (as wignmen), mainly because they all had a negative view of all this PU thing. Even today, if you ask someone for his opinion, he will tell you that it is stupid to listen to any flirt advice, and it seems strange to some people if one searches online or reading books about seduction.
But lately, the "war" against the Pickup scene has begun to grow. Anti-PUA forums, articles, reports and cartoons have begun to appear frequently in the media. Even in the TV series, the negative references are making their appearance, as I had written previously for the Criminal Minds series, where in an episode a PUA was a criminal.
In this episode of the Criminal Minds (SE4-EP9) with the title "Pickup", Prentiss asks Todd (the instructor) Why he Learns Men To be something that they are NOT". This episode analyzes many of the PUA techniques from their psychological side, and there are also some negative comments about the community, such as the "Master" instructor (who's dressed as the Mystery), or where as students they've hired the most "betas" they could found, just to "show to the world" what people are going to bootcamps, etc. And only Prentiss's question shows the whole image of the world's view for the "PUAs".
But Where there's smoke there's fire and maybe they have right to write such comments. Take for example Gunwitch, who shot a woman because she wasn't accept him at his approach , while recently Jason M. Berlin, Jonas Issac Dick, and Alexander Markham Smith, arrested for rape .
We also can't forget Elliot Rodger, who killed six people in Isla Vista, California , and also Julien, who got the most negative comments in the whole PU community, with his actions  and by bragging about 'raping' stripper who was 'totally not in the mood' .
And there is also John Mulvehill (aka JMULV), a former RSD instructor, who instead of "Pickup" a girl, he allegedly masturbated on the girl instead .
A scene from "The Big Bang Theory", where Howard tries to 'game' Penny, but he does not win her over (meaning that this stuff doesn't work).
OK, we could say that everything are fine now, these incidents are only a few and the dust settles. But the contrary, every once in a while we are hearing for something new about PU scene and that people are getting mad about. This time RooshV has recently made a statement about raping, where he wrote "For all other rapes, however, especially if done in a dwelling or on private property, any and all rape that happens should be completely legal" .
Roosh V gets a beer in his face by a woman.
And even infield videos have started to alarming women  and they are protesting against everyone who records and uploads their conversations on the internet , at least in Canada, where a Canadian Pickup instructor, Luke Howard, who has the channel "Lukeutopia", was forced to erase all his videos to avoid -I believe- unpleasant situations by women.
A scene from the TV show "Lucifer", where Lucifer refers to the students of a bootcamp as wicked and offends the "instructor" and the whole system. On the other hand, you can clearly see a lot of similarities to Pickup theories (I saved you $5,000 with this clip :)). It also refers to the hit of the time, "Cavemen" with "the conduct of the kick ass Caveman".
This, in turn, will make many young people to avoid the community or not to see it with a positive eye. As time passes we will learn more negative moves from the most famous PUAs, which will stir even more people against them. And because in many popular sites, many articles are written by women, the negativity will be even greater, as for example in an guardian's article , where the author warns women to watch army of sleazebags, saddos and weirdos PUAs.
Although the community began as an underground situation where only a few men has access, this is no longer the case, mainly because there are a lot of money on the table and the instructor's effort to make the community known to more and more people (which in turn, brings more money). And despite their effort to make Pickup mainstream, it will never happen and the reason are those negative situations, whereby Pickup players will be characterized as "weirdos" by the others.