You can say PCP is 'bad stuff', 'stay away' and all such opinionated comments but you cross the line when you say
the high you are feeling is essentailly the effect of something poisoning your system and causing perrmanent damage
This is how a lot of people seem to think drugs work, but it isn't very accurate even for drugs like PCP. Phencyclidine exhibits its effects by binding to NMDA and PCP receptors in the brain. Other 'common' drugs that do this are dextromethorphan and ketamine.