This sounds more like emotional manipulation. It is very easy to be tricked into seeing things that aren't real with powerful suggestion, especially as a child.
To be frank, most covens pitter out all by themselves. There's nothing to "get away" from. I know I've never met any form of pagan or ex pagan with this as a legitimate experience, so I have to take this with a pretty big grain of salt. I think you are more likely to run into a dangerous thing at a seedy bar than a pagan pride festival.
As far as the biker issue? Well, in the 70s there was a trend of gangs on the west coast that did some bad things, but most bikers at not like that. Usually you find this: http://bacaworld.org/
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