Cult - Member Suicides After Leaving

Here is the link to this cult http://www.enneagram-uk.com/index.php wich also is the similar kind as SRF and Spritual rights freedom. These cults have their root in Golden Down obviously wich was one of the first cults in Great Britain. This is a spiritistik cult, obviously. I just wounder, is it ok to think only positively? Dont you loose your contact of reality? Things are not always great and one need do some critical analyzation sometimes, but here you learn not to, so convenient in a cult that wants to use you!