Bad Apple Syndrome?

Why do some people who do wrong things always try hard to let other people do the same, and they know that it is bad?

Why some go to the extent of forcing (by power or law) their wrong doings on others who have no power?

They even sometimes try to scientifically convince people with how great this bad thing is.

Is it not enough that they are doing wrong, why does it have to infect all? can't understand the psycholgy of these people?

Like, some drugs being legalised for example in some countries. Alcohol, prostitution, ....etc.

Will there ever be a time when people get honest information?

that's how power manipulates these trash in the community.....
it is the individual's willingness to change that will make the difference....

all of us we are not same what our mind inside... that why we move in a right way or a wrong way!!! we believe that most of us are doing good, and some of it doing a bad things.... its up to us on how to handle our life!!! keep a nice and a good things in our life!!!