An accidental death is NOT suicide, even if the person did it themselves. You don't know the details of what happened, don't make that assumption.
Yeah, I think suicide is a selfish thing, because of the people left behind who are hurt by it. And if it was intentional, you have every right to speak your opinion but it is possible to do it without being such an asshole.
Most people who commit suicide are depressed, they have a problem that requires help. So because they are mentally unhealthy or unstable doesn't mean they don't deserve any respect or to be treated like crap.