Why do you think everyone should get voting rights if there is a section of the society who want to actively harm themselves. What are their votes reflective of?
Anyone who disagrees with me should be unable to vote.
The paradox of tolerance says I should not tolerate anyone who is intolerant, and if they disagree with me then they are intolerant and we should not tolerate them.
why do you want to create a policy for everyone based on actions of the few? the tails should be disregarded. so what if 5-10% of the people abuse a system that otherwise benefits the other 80-90% ? cost of doing business