LSD also has enamine-type reactivity because of the electron-donating effects of the indole ring. Because of this, chlorine destroys LSD molecules on contact; even though chlorinated tap water typically contains only a slight amount of chlorine, because a typical LSD solution only contains a small amount of LSD, dissolving LSD in tap water is likely to completely eliminate the substance.[4] The double bond between the 8-position and the aromatic ring, being conjugated with the indole ring, is susceptible to nucleophilic attacks by water or alcohol, especially in the presence of light. LSD often converts to "lumi-LSD", which is totally inactive in human beings (to the best of current knowledge).

Suspension of belief, more likely...

You can't be me, I'm taken