Hmmmm...Before one "resinifies" everything in the light of cactus thread there are some considerations.Surely the method is easy and its actually "evaporated tea" ,i am sure many people might have tried it not wanting to drink some distasteful for them tea but wanting the benefits of it.
A first consideration would be : is the resin the best method chemically speaking? For example in the rue example i think a simple Hasenfranz/Manske extraction is more desirable, because the straigh resin will contain other alkaloids you might not want.
A second consideration is the final volume of the resin to be consumed.You wouldnt like to be gulping down 30 capsules, right? Oh wait , some people are already doing it
Those are just my 2 cents, feel free to comment