I have been reading (and listening to audio readings of) Rudolf Steiner for a few months, under some kind of inner compulsion - while feeling rather little benefit from it, and seeming to waste quite a lot of time.
...But getting no harm, I think - because when Steiner is wrong - as he so often is - he is typically so bizarre, so 'silly'; that I seem to just shed it like water off a duck's back.
It is worth remembering that when CS Lewis died in 1963, both of his two legal and literary executors were utterly dedicated Steinerite Anthroposophists.
(These were Owen Barfield and Cecil Harwood - Barfield was the leading British Anthroposophist intellectual - later mentoring Saul Bellow among many others; Harwood was Headmaster of a Steiner Waldorf School - both had been at Oxford contemporary with Lewis.)
Lewis had no interest in Steiner, and saw no merit in him; but saw no significant harm in him either - and this was after observing the effect of forty years of full-blown Anthroposophy on two very close friends. For those of us who regard Lewis as a beloved and mostly-reliable spiritual guide, this must be significant.
But just recently, after banging my head against Steiner apparently fruitlessly, I have been rewarded by some worthwhile insights and clarifications which I perhaps would not otherwise have received. So my time was not wasted, but well spent!
Which just goes to show that instinct sometimes knows more than reason - or something of the kind...