Evey, Sprout was not being irresponsible. In fact, he was the total opposite -- turning around and admitting the existence of a downside was thoroughly responsible, under the circumstances. If you cast your mind back, I asked about trying 3-FPM not long before you did. And you saw the same answers I did.
Sprout was just being honest about the drug. Yes, he had been singing its praises not long before, but that was the main topic of the thread -- most people kind of assume there has to be a negative aspect, even if it isn't stated out loud in a larger, bold font in a contrasting colour. The point is, harm reduction advice was given when it was asked for. He wasn't just back-pedalling to put us off trying it! Ultimately, nobody else is responsible for an individual's decision whether or not to try a particular drug.