Thinair mentioned this thread may be of interest on my brief return so here's my ten denk ;-)
there's been lots of talk of whether this thread (and its topic) are 'responsible'.. a suitable subject for an open forum. Whilst i see where ppl's concern lies it my belief that
NOT talking about the use of 'entheogens' in our practices actually leads to more potential dangers..
a few points ..in no particular order:) just my opinions/ideas
'Drugs'... to discuss the matter fully it would be helpful to drop this term altogether. It's silly to lump together substances which have WIDELY different effects.
this thread is specifically about Fly Agaric.. the alkaloids it contains are NOT restricted under the misuse of drugs act, so legality/illegality is a moot point.
'Drugs', in the general sense, cause addiction. the active compounds in many 'hallucinogenic' species have a tolerence effect, so u simply cannot become addicted as u cannot use them day after day. 'drugs' in the sense of 'hey lets paaaarty' dont really apply here either, im pretty sure no-one uses fly agaric 'recreationally' (least i hope so!!).
The Fly Agaric contains several active compounds.. which CAN induce a 'visionary state'.
HOWEVER...
the alkaloid content can vary according to SEVERAL factors.. age of the 'fruiting body', soil conditions, genetic factors, plant to plant, even year to year etc.. in other words -u find several fly agaric in a wood.. fruit A
could contain upto 5x the amount of active compounds as fruit B ..which grows 10 feet away!! so its a kind of 'entheogenic russian roulette'... UNLESS u visit the SAME plant.. year after year and build a relationship to THAT plant (and its level of active compunds).
( this is also the reason im horrified when i see it on sale in 'head shops' after the short sighted psilocybin mushroom ban.. its simply FAR more dangerous)
there has been talk of LSD and psilocybin as well in this thread. these substances are well known for the 'visionary' properties, but they are radically different from fly agaric chemically speaking.(so different in fact that they are illegal to possess under current UK law).
ive tried fly agaric all of twice. each time was very uncomfortable... and u were so busy monitoring yr body's signs (breathing/heart rate etc) that any gnosis that is there was easily missed. (makes me think of 'ordeal poisons'! ;-)
Fly agaric can be classed as a 'delirient' more than a (purely) 'visionary' substance IMO, the same could be said of deadly nightshade/belladonna. both have a history of use within 'Witchcraft' (especially of the more traditional kind) but for me the states produced are too fraught with danger (mental and physical).
in short-- id simply advise against the use of fly agaric..full stop.id also advise against 'recreational' use of such substances..
in principal. but the last thing u want if u work with these substances is any subconscious xtian guilt over yr 'hedonism' ;-)
SO
if u intend to seriuosly try these things.. do so with CLEAR intent and step LIGHTLY (in spirit and dosage). there was mention of 'over doing' entheogens earlier in this thread.. the classic,, 20 didnt do enough ..so i took 300 and regretted it

i can only echo this warning
With other 'spiritual disciplines' the emphasis is on dedication/repetition- the more u put in the more u get out, IMO entheogens are the opposite. if you approach with the notion of 'throwing yrself into it' you'll do more harm than good. yr foot should be firmly on the break, with an attitude of
OPEN exploration. leave yr 'high n mighty' magick robes at the door,drop any notions of 'control'.. be receptive and honest.
large groups are to be avoided, a 'straight' (non-participant) TRUSTED friend is useful but try n throw away any ideas of a 'Guide' ala Leary in the sixties. Terence McKenna's idea of a 'Sitter' is more useful- a trusted non-participant u can 'summon' with a call from the next room etc, who;ll stick their head round the door or chat
if needs be.
working with entheogens OUTSIDE can be VERY rewarding, but disorientating. indoor use first would be far better. IF outside, pick yr spot carefully.. u dont want random ramblers interupting you;-) (and dont go to local sacred sites and then wonder why yr suddenly a bit 'freaked out'!)
of course u should also research thoroughly before setting out..
Erowid.. is THE essential online guide to effects/dosage/experiences.
Shroom- by andy letchford (review on this site somewhere) is a SOLID piece of research into both fly agaric and psilocybin mushrooms.(not very 'practical' though)
Timothy Leary.. GASP!

although discredited in many circles his work on SET and SETTING is still invaluable IMO.
http://en.wikipedia.org/wiki/Set_and_setting i could recommend more but ill close with..
just lie down/sit still.. keep your eyes closed;-)
Lumi