When you say abuse sir what exactly do you mean? I honestly don't think ive suffered any mental damage from the few times ive used it.
Abuse is a relative term that applies to the individual. For instance, I have a friend that smokes pot 3x day every day and has since he was 15-16 years old. He also has 2 Masters degrees and is one of the nicest guys you'll ever meet. For most other people, that level of cannabis intake would constitute abuse. For him its just the way he works - maybe his brain functions better on it, who knows.
Most every urban myth about LSD (It stays in your spine forever, you'll think you're a glass of orange juice, it was developed by the CIA for mind control, etc) are absolutley false. Compared to its active dosage, LSD is actually a very safe compound requiring more than 600x its threshold dose to reach LD-50. In strict terms of
physical safety, most prescription, OTC, and legal recreational drugs carry far greater risk than LSD. That being said, you would probably suffer some pretty severe
mental issues if you ingested 300+ hits of LSD...something on that level could take years to integrate, if it didnt cause a psychotic break or have you suffering HPPD symptoms down the road.
IMO, the danger in an LSD experience, or any experience that alters perception on that level, is the failure to respect the compound and use it in the proper set and setting. Psychedelic drugs have been used by humans since the dawn of mankind, mostly revered as ritualistic sacraments that produce spiritual visions,etc. They generally werent used casually and there was normally and elder 'spirit guide' who was present to help guide the person through the experience, etc.
This is not saying that the casual user should start worshipping Crom in order use these compounds, but understand that the experience can be a powerful/overwhelming one and ensure you are in trusted and safe company, in a comfortable environment, NOT DRIVING, etc.
Would you say taking it a few times a year is an acceptable health risk?
Not many recreational drugs, legal or illegal, or going to have any negative physical repurcussions using them a couple times a year. You're biggest risk in this regard is that you're breaking the law, as even posession of one dose of a compound like LSD, Psilocybin mushrooms,Ecstacy etc constitutes a felony in most states.
The best advice here is to know the risks, know your body, and know your mind. Educate yourself as much as possible on the compounds you put into your body - recreational or otherwise.
BV